Hi, for example when you try
guix build -S ldc it will not put phobos in the correct place (which is unpacked to the correct place in a phase). It would be nice if there was a way to run gdb after the build phase ran. [I guess easiest would be if one could insert something after the 'build phase (and/or after the 'unpack phase) from the command line. Sounds hacky, though. Or maybe a phase that's always there in the build systems which doesn't do anything if no command line "enable" flag is given. That sounds hacky.] Or maybe something like --keep-failed just that it always keeps (also when not failed). Huh, that would go a long way. What would you think about that?
