I've a minor feature request. When working on new package definitions, it's often useful to debug build failures with guix environment. The current implementation, as I understand it, requires manually downloading the source, and merely drops you into whatever working directory you happen to be it. It would be great if there were an option you could pass that downloads and unpacks the source somewhere and drops you into the newly unpacked source directory. Not sure what to call it exactly, but something like: guix environment --with-source hello Should drop you into an unpacked source directory with the inputs and such for building "hello". live well, vagrant