
Allows `all` to be configured non-buildable in packages.yaml. The following config would only allow zlib to be built by Spack, all other packages would have to be found as externals. ``` packages: all: buildable: False zlib: buildable: True ```
Allows `all` to be configured non-buildable in packages.yaml. The following config would only allow zlib to be built by Spack, all other packages would have to be found as externals. ``` packages: all: buildable: False zlib: buildable: True ```