# fx gen | |
run `gn gen` against the Fuchsia build directories. | |
```none | |
Execute a `gn gen` against the Fuchsia build | |
If successful, execute a `gn gen` against the Fuchsia build. | |
In abstract, if FUCHSIA_BUILD_DIR is out/x64, this is simply: | |
gn gen out/x64 | |
It is useful if one has by some mechanism deleted the ninja artifacts, but | |
not the args.gn, e.g. if one CTRL+C's a regen step (gn bug). | |
``` | |
[gen source code](https://cs.opensource.google/fuchsia/fuchsia/+/main:tools/devshell/gen) |