diff --git a/Cargo.lock b/Cargo.lock
index fc8cc27..4f11b53 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5,7 +5,7 @@
 version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -13,19 +13,19 @@
 version = "0.2.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "backtrace"
-version = "0.3.33"
+version = "0.3.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "backtrace-sys 0.1.31 (registry+https://github.com/rust-lang/crates.io-index)",
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-demangle 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-demangle 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -33,8 +33,8 @@
 version = "0.1.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.38 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.45 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -44,17 +44,26 @@
 
 [[package]]
 name = "bitflags"
-version = "1.1.0"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
+name = "c2-chacha"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ppv-lite86 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "cc"
-version = "1.0.38"
+version = "1.0.45"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "cfg-if"
-version = "0.1.9"
+version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -64,36 +73,36 @@
 dependencies = [
  "ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "atty 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-width 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-width 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "either"
-version = "1.5.2"
+version = "1.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "failure"
-version = "0.1.5"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "backtrace 0.3.33 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure_derive 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace 0.3.38 (registry+https://github.com/rust-lang/crates.io-index)",
+ "failure_derive 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "failure_derive"
-version = "0.1.5"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.42 (registry+https://github.com/rust-lang/crates.io-index)",
- "synstructure 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "synstructure 0.12.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -101,13 +110,14 @@
 version = "0.2.0"
 dependencies = [
  "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "failure 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "itertools 0.7.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "notify 4.0.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.98 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.98 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
- "structopt 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "notify 4.0.13 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
+ "structopt 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "toml 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "uname 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -121,12 +131,13 @@
 
 [[package]]
 name = "filetime"
-version = "0.2.5"
+version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -134,7 +145,7 @@
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "fsevent-sys 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -143,7 +154,7 @@
 version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -159,7 +170,7 @@
 version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -177,6 +188,16 @@
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
+name = "getrandom"
+version = "0.1.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasi 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "heck"
 version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -189,9 +210,9 @@
 version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "inotify-sys 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -199,16 +220,15 @@
 version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "iovec"
-version = "0.1.2"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -216,7 +236,7 @@
 version = "0.7.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "either 1.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "either 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -234,13 +254,18 @@
 ]
 
 [[package]]
+name = "lazy_static"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
 name = "lazycell"
 version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "libc"
-version = "0.2.60"
+version = "0.2.62"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -248,7 +273,7 @@
 version = "0.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -258,9 +283,9 @@
 dependencies = [
  "fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "iovec 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "iovec 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "miow 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "net2 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -295,50 +320,47 @@
 version = "0.2.33"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "notify"
-version = "4.0.12"
+version = "4.0.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "filetime 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "filetime 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "fsevent 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "fsevent-sys 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "inotify 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
  "mio 0.6.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "mio-extras 2.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "walkdir 2.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
+name = "ppv-lite86"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
 name = "proc-macro-error"
 version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "0.4.30"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "proc-macro2"
-version = "1.0.3"
+version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -346,18 +368,47 @@
 
 [[package]]
 name = "quote"
-version = "0.6.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "quote"
 version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rand"
+version = "0.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "getrandom 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_chacha 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_hc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "c2-chacha 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "getrandom 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rand_hc"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "rand_core 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -366,13 +417,21 @@
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
+name = "remove_dir_all"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "rustc-demangle"
-version = "0.1.15"
+version = "0.1.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "ryu"
-version = "1.0.0"
+version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -385,27 +444,30 @@
 
 [[package]]
 name = "serde"
-version = "1.0.98"
+version = "1.0.101"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "serde_derive 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.98"
+version = "1.0.101"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "serde_json"
-version = "1.0.40"
+version = "1.0.41"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "itoa 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "ryu 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.98 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ryu 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.101 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -420,54 +482,57 @@
 
 [[package]]
 name = "structopt"
-version = "0.3.1"
+version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "structopt-derive 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "structopt-derive 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "structopt-derive"
-version = "0.3.1"
+version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "heck 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "proc-macro-error 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro2 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
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 "checksum toml 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)" = "758664fc71a3a69038656bee8b6be6477d2a6c315a6b81f7081f591bffa4111f"
 "checksum uname 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b72f89f0ca32e4db1c04e2a72f5345d59796d4866a1ee0609084569f73683dc8"
 "checksum unicode-segmentation 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1967f4cdfc355b37fd76d2a954fb2ed3871034eb4f26d60537d88795cfc332a9"
-"checksum unicode-width 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "882386231c45df4700b275c7ff55b6f3698780a650026380e72dabe76fa46526"
-"checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
+"checksum unicode-width 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "7007dbd421b92cc6e28410fe7362e2e0a2503394908f417b68ec8d1c364c4e20"
 "checksum unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
 "checksum vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "05c78687fb1a80548ae3250346c3db86a80a7cdd77bda190189f2d0a0987c81a"
 "checksum walkdir 2.2.9 (registry+https://github.com/rust-lang/crates.io-index)" = "9658c94fa8b940eab2250bd5a457f9c48b748420d71293b165c8cdbe2f55f71e"
+"checksum wasi 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b89c3ce4ce14bdc6fb6beaf9ec7928ca331de5df7e5ea278375642a2f478570d"
 "checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
-"checksum winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)" = "f10e386af2b13e47c89e7236a7a14a086791a2b88ebad6df9bf42040195cf770"
+"checksum winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "8093091eeb260906a183e6ae1abdba2ef5ef2257a21801128899c3fc699229c6"
 "checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
 "checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 "checksum winapi-util 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7168bab6e1daee33b4557efd0e95d5ca70a03706d39fa5f3fe7a236f584b03c9"
diff --git a/Cargo.toml b/Cargo.toml
index d07347e..6dd17c2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,10 +10,11 @@
 itertools = "0.7"
 uname = "0.1.1"
 notify = "4.0.0"
-serde = "1.0"
+serde = { version = "1.0", features = ["derive"] }
 serde_derive = "1.0"
 serde_json = "1.0"
 structopt = "0.3"
+tempfile = "3.1"
 toml = "0.4"
 
 [[bin]]
diff --git a/README.md b/README.md
index 73b35d3..a367707 100644
--- a/README.md
+++ b/README.md
@@ -1,39 +1,40 @@
 # fargo
 
-    fargo v0.2.0
-    Fargo is a prototype Fuchsia-specific wrapper around Cargo
+    fargo 0.2.0
+    Fargo is a prototype Fuchsia-specific wrapper around Cargo.
 
     USAGE:
-        fargo [FLAGS] [OPTIONS] [SUBCOMMAND]
+        fargo [FLAGS] [OPTIONS] <SUBCOMMAND>
 
     FLAGS:
-            --disable-cross-env    Disable the setting of CC, AR and such environmental variables.
+            --disable-cross-env    Disable the setting of CC, AR and such environmental variables
         -h, --help                 Prints help information
         -V, --version              Prints version information
         -v, --verbose              Print verbose output while performing commands
 
     OPTIONS:
-        -N, --device-name <device-name>        Name of device to target, needed if there are multiple devices
-                                               visible on the network
+        -N, --device-name <device-name>        Name of device to target, needed if there are multiple devices visible on the
+                                               network
             --manifest-path <manifest-path>    Path to Cargo.toml
 
     SUBCOMMANDS:
         autotest             Auto build and test in Fuchsia device or emulator
         build                Build binary targeting Fuchsia device or emulator
         build-rustc          Build rustc targeting Fuchsia
-        cargo                Run a cargo command for Fuchsia. Use -- to indicate that all following arguments
-                             should be passed to cargo.
+        cargo                Run a cargo command for Fuchsia. Use -- to indicate that all following arguments should be
+                             passed to cargo.
         check                Check binary targeting Fuchsia device or emulator
         configure            Run a configure script for the cross compilation environment
         doc                  Build a package's documentation
         enable-networking    Enable networking for a running emulator
+        fmt                  Run cargo fmt using the Fuchsia toolchain
         help                 Prints this message or the help of the given subcommand(s)
         list-devices         List visible Fuchsia devices
-        load-driver          Build driver and load it on Fuchsia device or emulator.
         make-package         Make a Fuchsia package from an unstripped binary
         pkg-config           Run pkg-config for the cross compilation environment
         restart              Stop all Fuchsia emulators and start a new one
         run                  Run binary on Fuchsia device or emulator
+        run-on-target        Act as as custom runner for Cargo targeting a Fuchsia device
         ssh                  Open a shell on Fuchsia device or emulator
         start                Start a Fuchsia emulator
         stop                 Stop all Fuchsia emulators
@@ -50,7 +51,8 @@
 
 The [Fuchsia Getting
 Started](https://fuchsia.googlesource.com/fuchsia/+/master/docs/getting_started.md)
-instruction are what you need.
+instruction are what you need. Make sure that `fx serve` is running pointed at
+this Fuchsia build.
 
 Once this build is complete, clone and build fargo. For this you will need
 a working host Rust installation, most easily installed with [rustup](https://rustup.rs).
@@ -81,11 +83,14 @@
 rust project.
 
 Additionally, if you are using qemu you need to enable networking, otherwise fargo won't be able to
-copy the binary onto then fuchsia machine to run the tests.
+use `fx shell` to invoke the test binary.
 
 ### Escaping parameters
 
-Sometimes you want to pass parameters through fargo and cargo and on to something like rustc. To make this easier fargo will convert a "++" parameter to "--" when invoking cargo. For example, the following command:
+Sometimes you want to pass parameters through fargo and cargo and on to
+somethinglike rustc. To make this easier fargo will convert a "++"
+parameter to "--" when invoking cargo. For example, the following
+command:
 
     fargo cargo rustc -- ++ --emit=llvm-ir
 
@@ -111,11 +116,10 @@
 
 ## Getting help
 
-For problems getting the Fuchsia build to complete, the #fuchsia IRC channel on
-freenode is the best bet.
+For problems getting the Fuchsia build to complete, the [getting started](https://fuchsia.dev/fuchsia-src/getting_started.md)
+page on [fuchsia.dev](https://fuchsia.dev) is the best place to start looking for help.
 
-For fargo itself, that IRC channel can also work of one of the more Rust-aware
-folks happens to be paying attention. More reliable is the
+For fargo itself, the best place for help is the
 [rust-fuchsia](https://groups.google.com/a/fuchsia.com/forum/#!aboutgroup/rust-fuchsia) Google group.
 
 ## Using different versions of cargo and rustc
diff --git a/src/command_line.rs b/src/command_line.rs
index 94093c1..6c48e4c 100644
--- a/src/command_line.rs
+++ b/src/command_line.rs
@@ -146,7 +146,7 @@
 
     /// Path to sandbox file to use when running.
     #[structopt(long)]
-    cmx_path: PathBuf,
+    cmx_path: Option<PathBuf>,
 
     /// Name of app as it appears in the manifest file.
     #[structopt(long, default_value = "app")]
@@ -412,7 +412,7 @@
                     verbose,
                     release: false,
                     nocapture: false,
-                    run_mode: RunMode::Normal,
+                    run_mode: RunMode::Run,
                     story_name: None,
                     mod_name: None,
                     disable_cross: opt.disable_cross_env,
@@ -527,8 +527,7 @@
                 params.push(example);
             }
 
-            let run_mode =
-                run_switches_to_mode(run.run_with_tiles, run.run_with_run, run.run_with_sessionctl);
+            let run_mode = run_switches_to_mode(run.run_with_tiles, run.run_with_sessionctl);
             return run_binary(
                 &run_cargo_options
                     .release(run.release)
@@ -548,7 +547,6 @@
             let run_params: Vec<&str> = run_on_target.runner_args.iter().map(|s| &**s).collect();
             let run_mode = run_switches_to_mode(
                 run_on_target.run_with_tiles,
-                run_on_target.run_with_run,
                 run_on_target.run_with_sessionctl,
             );
 
@@ -621,7 +619,7 @@
 
             let test_args = test_opts.test_args;
 
-            let run_mode = run_switches_to_mode(false, test_opts.run_with_run, false);
+            let run_mode = run_switches_to_mode(false, false);
             return run_tests(
                 &run_cargo_options
                     .cmx_path(test_opts.cmx_path)
diff --git a/src/device.rs b/src/device.rs
index 66412b7..7dd98eb 100644
--- a/src/device.rs
+++ b/src/device.rs
@@ -8,7 +8,7 @@
 use crate::utils::is_mac;
 use failure::{bail, err_msg, Error, ResultExt};
 use std::env;
-use std::path::{Path, PathBuf};
+use std::path::Path;
 use std::process::{Command, Stdio};
 use std::{str, thread, time};
 
@@ -55,47 +55,6 @@
     "ConnectTimeout=20",
 ];
 
-pub fn scp_to_device(
-    verbose: bool,
-    config: &FuchsiaConfig,
-    netaddr: &str,
-    source_path: &PathBuf,
-    destination_path: &str,
-) -> Result<(), Error> {
-    let destination_with_address = format!("[{}]:{}", netaddr, destination_path);
-    let ssh_config = target_out_dir(config)?.join("ssh-keys/ssh_config");
-    if !ssh_config.exists() {
-        bail!("ssh config not found at {:?}", ssh_config);
-    }
-    if verbose {
-        println!("destination_with_address = {}", destination_with_address);
-        println!("ssh_config = {:?}", ssh_config);
-    }
-
-    let mut scp_command = Command::new("scp");
-
-    scp_command
-        .env_remove("SSH_AUTH_SOCK")
-        .arg(if verbose { "-v" } else { "-q" })
-        .arg("-F")
-        .arg(ssh_config)
-        .args(SSH_OPTIONS)
-        .arg(source_path)
-        .arg(destination_with_address);
-
-    if verbose {
-        println!("{:?}", scp_command);
-    }
-
-    let scp_result = scp_command.status().context("unable to run scp")?;
-
-    if !scp_result.success() {
-        bail!("scp failed with error {:?}", scp_result);
-    }
-
-    Ok(())
-}
-
 pub fn ssh(
     verbose: bool,
     config: &FuchsiaConfig,
@@ -306,7 +265,8 @@
 }
 
 pub fn stop_emulator() -> Result<(), Error> {
-    Command::new("killall").arg("-9").arg("-m").arg("qemu-system-x86_64.*").status()?;
+    let reg_ex_flag = if is_mac() { "-m" } else { "-r" };
+    Command::new("killall").arg("-9").arg(reg_ex_flag).arg("qemu-system-x86_64.*").status()?;
     Ok(())
 }
 
diff --git a/src/lib.rs b/src/lib.rs
index cbc037b..807f43e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -19,18 +19,15 @@
 pub use crate::sdk::{FuchsiaConfig, TargetOptions};
 
 use crate::cross::{pkg_config_path, run_configure};
-use crate::device::{enable_networking, netaddr, scp_to_device, ssh};
+use crate::device::{enable_networking, ssh};
 use crate::package::make_package;
-use crate::{
-    sdk::{
-        cargo_path, clang_archiver_path, clang_c_compiler_path, clang_cpp_compiler_path,
-        clang_ranlib_path, clang_resource_dir, rustc_path, rustdoc_path, shared_libraries_path,
-        sysroot_path, zircon_build_path,
-    },
-    utils::strip_binary,
+use crate::sdk::{
+    cargo_path, clang_archiver_path, clang_c_compiler_path, clang_cpp_compiler_path,
+    clang_ranlib_path, clang_resource_dir, rustc_path, rustdoc_path, shared_libraries_path,
+    sysroot_path, zircon_build_path,
 };
 
-use failure::{bail, err_msg, format_err, Error, ResultExt};
+use failure::{bail, err_msg, Error, ResultExt};
 use std::fs;
 use std::fs::File;
 use std::io::Write;
@@ -38,28 +35,6 @@
 use std::process::Command;
 use std::time::SystemTime;
 
-fn copy_to_target(
-    source_path: &PathBuf,
-    verbose: bool,
-    config: &FuchsiaConfig,
-    target_options: &TargetOptions<'_, '_>,
-) -> Result<String, Error> {
-    let netaddr = netaddr(verbose, target_options)?;
-    if verbose {
-        println!("netaddr {}", netaddr);
-    }
-    let destination_path = format!(
-        "/tmp/{}",
-        source_path
-            .file_name()
-            .ok_or(format_err!("file_name failed on {:#?}", source_path))?
-            .to_string_lossy()
-    );
-    println!("copying {} to {}", source_path.to_string_lossy(), destination_path);
-    scp_to_device(verbose, config, &netaddr, &source_path, &destination_path)?;
-    Ok(destination_path)
-}
-
 fn run_program_on_target(
     filename: &str,
     verbose: bool,
@@ -75,37 +50,20 @@
     test_args: Option<&str>,
 ) -> Result<(), Error> {
     let source_path = PathBuf::from(&filename);
-    let target_string = match run_mode {
-        RunMode::Normal => {
-            let stripped_source_path = strip_binary(&source_path)?;
-            copy_to_target(&stripped_source_path, verbose, config, target_options)?
-        }
-        _ => {
-            if cmx_path.is_none() {
-                bail!("Run modes other than normal require a path to a cmx file");
-            }
-            make_package(
-                verbose,
-                target_options,
-                &source_path,
-                cmx_path.as_ref().unwrap(),
-                app_name,
-            )?
-        }
-    };
+
+    let target_string = make_package(verbose, target_options, &source_path, cmx_path, app_name)?;
 
     let mut command_string = match run_mode {
         RunMode::Tiles => "tiles_ctl add ".to_string(),
-        RunMode::Ermine => {
+        RunMode::SessionCtl => {
             format!("sessionctl --story_name={} --mod_name={} --mod_url=", story_name, mod_name)
         }
         RunMode::Run => "run ".to_string(),
-        RunMode::Normal => "".to_string(),
     };
     command_string.push_str(&target_string);
 
     match run_mode {
-        RunMode::Ermine => {
+        RunMode::SessionCtl => {
             command_string.push_str(" add_mod");
         }
         _ => (),
@@ -252,26 +210,23 @@
 
 #[derive(Clone, Copy, Debug)]
 pub enum RunMode {
-    Normal,
     Run,
     Tiles,
-    Ermine,
+    SessionCtl,
 }
 
 impl Default for RunMode {
     fn default() -> Self {
-        RunMode::Normal
+        RunMode::Run
     }
 }
-fn run_switches_to_mode(tiles: bool, run: bool, ermine: bool) -> RunMode {
+fn run_switches_to_mode(tiles: bool, session_ctl: bool) -> RunMode {
     if tiles {
         RunMode::Tiles
-    } else if run {
-        RunMode::Run
-    } else if ermine {
-        RunMode::Ermine
+    } else if session_ctl {
+        RunMode::SessionCtl
     } else {
-        RunMode::Normal
+        RunMode::Run
     }
 }
 
@@ -383,6 +338,10 @@
         format!("-Clink-arg=-L{}", sysroot_lib),
         format!("-Clink-arg=-L{}/gen/zircon/public/lib/fdio", shared_lib_path.to_string_lossy(),),
         format!("-Clink-arg=-L{}/gen/zircon/public/lib/syslog", shared_lib_path.to_string_lossy(),),
+        format!(
+            "-Clink-arg=-L{}/gen/zircon/public/lib/trace-engine",
+            shared_lib_path.to_string_lossy(),
+        ),
         format!("-Clink-arg=-L{}", clang_resource_lib.to_string_lossy()),
         format!("-Clink-arg=--sysroot={}", sysroot_as_path.to_string_lossy()),
         format!("-Lnative={}", shared_libraries_path(target_options)?.to_string_lossy()),
@@ -404,7 +363,7 @@
 ) -> Result<String, Error> {
     let cmx_path;
     let tiles_arg = format!("--{}", RUN_WITH_TILES);
-    let ermine_arg = format!(
+    let session_ctl_arg = format!(
         "--{} --story-name={} --mod-name={}",
         RUN_WITH_SESSIONCTL,
         options.get_story_name(),
@@ -440,13 +399,6 @@
         cmx_path = passed_path.to_string_lossy().to_string();
         runner_args.push(&cmx_arg);
         runner_args.push(&cmx_path);
-    } else {
-        match options.run_mode {
-            RunMode::Normal => (),
-            _ => {
-                bail!("Run modes other than normal require a path to a cmx file");
-            }
-        }
     }
 
     if nocapture {
@@ -454,9 +406,8 @@
     }
 
     match options.run_mode {
-        RunMode::Normal => (),
         RunMode::Tiles => runner_args.push(&tiles_arg),
-        RunMode::Ermine => runner_args.push(&ermine_arg),
+        RunMode::SessionCtl => runner_args.push(&session_ctl_arg),
         RunMode::Run => runner_args.push(&run_arg),
     }
 
@@ -504,7 +455,7 @@
 ///         verbose: false,
 ///         release: true,
 ///         nocapture: false,
-///         run_mode: RunMode::Normal,
+///         run_mode: RunMode::Run,
 ///         story_name: None,
 ///         mod_name: None,
 ///         disable_cross: false,
diff --git a/src/package.rs b/src/package.rs
index e5fcab4..7815820 100644
--- a/src/package.rs
+++ b/src/package.rs
@@ -3,21 +3,48 @@
 // found in the LICENSE file.
 
 use crate::{
+    get_triple_cpu,
     sdk::{
         amber_path, clang_base_path, cmc_path, fuchsia_dir, package_manager_path,
         shared_libraries_path, zircon_build_path, FuchsiaConfig, TargetOptions,
     },
     utils::strip_binary,
-    get_triple_cpu,
 };
 use failure::{bail, format_err, Error, ResultExt};
+use serde::{Deserialize, Serialize};
 use serde_json::json;
 use std::{
+    collections::HashMap,
     fs::{create_dir_all, File},
     io::Write,
     path::{Path, PathBuf},
     process::Command,
 };
+use tempfile::{tempdir, TempDir};
+
+#[derive(Serialize, Deserialize)]
+struct Sandbox {
+    services: Vec<String>,
+}
+#[derive(Serialize, Deserialize)]
+
+struct SandboxFile {
+    program: HashMap<String, String>,
+    sandbox: Sandbox,
+}
+
+fn default_sandbox_file(temp_dir: &TempDir) -> Result<PathBuf, Error> {
+    let path = temp_dir.path().join("default.cmx");
+    let services = vec![];
+    let sandbox = Sandbox { services };
+    let mut program = HashMap::new();
+    program.insert("binary".to_string(), "bin/app".to_string());
+    let sandbox_file = SandboxFile { program, sandbox };
+    let serialized_sandbox_file = serde_json::to_string(&sandbox_file).expect("serialized");
+    let mut temp_sandbox_file = File::create(&path)?;
+    writeln!(temp_sandbox_file, "{}", serialized_sandbox_file)?;
+    Ok(path)
+}
 
 fn validate_cmx_file(
     verbose: bool,
@@ -43,9 +70,15 @@
     Ok(())
 }
 
-fn format_cmx_file(fuchsia_config: &FuchsiaConfig, cmx_path: &Path) -> Result<PathBuf, Error> {
+fn format_cmx_file(
+    fuchsia_config: &FuchsiaConfig,
+    cmx_path: &Path,
+    temp_dir: &TempDir,
+) -> Result<PathBuf, Error> {
+    let temp_dir_str = temp_dir.path().to_string_lossy();
     let destination_path = format!(
-        "/tmp/{}",
+        "{}/{}",
+        temp_dir_str,
         cmx_path
             .file_name()
             .ok_or(format_err!("file_name failed on {:#?}", cmx_path))?
@@ -206,6 +239,13 @@
         .output()
         .context("Running `cmc` to format cmx file")?;
 
+    if verbose {
+        println!("pm build stdout: {}", String::from_utf8_lossy(&output.stdout));
+        if output.status.success() {
+            println!("pm build stderr: {}", String::from_utf8_lossy(&output.stderr));
+        }
+    }
+
     if !output.status.success() {
         bail!("pm returned error: {}", String::from_utf8_lossy(&output.stderr));
     }
@@ -234,6 +274,13 @@
         .output()
         .context("Running `pm_archive` to build an archive")?;
 
+    if verbose {
+        println!("pm archive stdout: {}", String::from_utf8_lossy(&output.stdout));
+        if output.status.success() {
+            println!("pm archive stderr: {}", String::from_utf8_lossy(&output.stderr));
+        }
+    }
+
     if !output.status.success() {
         bail!("pm returned error: {}", String::from_utf8_lossy(&output.stderr));
     }
@@ -264,6 +311,13 @@
         .output()
         .context("Running `publish` to publish package")?;
 
+    if verbose {
+        println!("pm publish stdout: {}", String::from_utf8_lossy(&output.stdout));
+        if output.status.success() {
+            println!("pm publish stderr: {}", String::from_utf8_lossy(&output.stderr));
+        }
+    }
+
     if !output.status.success() {
         bail!("pm returned error: {}", String::from_utf8_lossy(&output.stderr));
     }
@@ -275,9 +329,18 @@
     verbose: bool,
     target_options: &TargetOptions<'_, '_>,
     binary_path: &Path,
-    cmx_path: &Path,
+    optional_cmx_path: &Option<PathBuf>,
     app_name: &str,
 ) -> Result<String, Error> {
+    let temp_dir = tempdir()?;
+    let dfs;
+    let cmx_path = if let Some(path) = optional_cmx_path.as_ref() {
+        path
+    } else {
+        dfs = default_sandbox_file(&temp_dir)?;
+        &dfs
+    };
+
     let binary_parent =
         binary_path.parent().expect(&format!("Can't get parent of {:#?}", binary_path));
     let mut package_name = binary_path
@@ -295,11 +358,11 @@
     }
     create_dir_all(&output_path).context("create_dir_all failed")?;
     let stripped_binary_path = strip_binary(binary_path)?;
-    validate_cmx_file(verbose, &target_options.config, cmx_path)?;
-    let formatted_path = format_cmx_file(&target_options.config, cmx_path)?;
-    let package_path = PathBuf::from("/tmp/package");
+    validate_cmx_file(verbose, &target_options.config, &cmx_path)?;
+    let formatted_path = format_cmx_file(&target_options.config, &cmx_path, &temp_dir)?;
+    let package_path = temp_dir.path().join("package");
     write_package_file(verbose, &package_path, &package_name)?;
-    let manifest_path = PathBuf::from("/tmp/manifest");
+    let manifest_path = temp_dir.path().join("manifest");
     write_manifest_file(
         verbose,
         &target_options,