Hey there, After building netpbm from source using no substitutes, running this command:
% guix build --source netpbm --check Will use the checked out source files in /gnu/store rather than redownloading from the project SVN repostiory. This is unlike this command: % guix build --source guix --check Which will refetch Guix from the project's Git repository. Cheers, Jookia.