# Set GNUSTEP_MAKEFILES
GNUstep-make resolves the files it includes relative to the `GNUSTEP_MAKEFILES` environment variable. Often, the value of this is `/Library/GNUstep/Makefiles`, but you can set it correctly by running this command:

```bash
% export GNUSTEP_MAKEFILES=`gnustep-config --var=GNUSTEP_MAKEFILES`
```

If you get build errors about `missing /common.make`, it's because you didn't set this variable.
The other way to set it is to source the `GNUstep.sh` script (or `GNUstep.csh` on C-style shells like `tcsh`), but as this script is _inside_ the `GNUSTEP_MAKEFILES` folder this isn't a good way to discover the location. You source the script in a `.rc` or `.profile` file.