> last five versions If the build method has not changed then all you need is five tarballs and use `guix build foo --with-source=foo-0.0.n.tar.gz`. > build s

> last five versions If the build method has not changed then all you need is five tarballs and use `guix build foo --with-source=foo-0.0.n.tar.gz`. > build system pulls in a big GUI toolkit binary This is less likely to work, but it depends on how the big binary is linked. > just something quick and dirty You can use "guix build foo --with-source=..." for quick and dirty things. For something slightly less quick and slightly less dirty you can define a local package expression using the Guix DSL, dump that in a file, and build it from there.