Hi Ivan, On Mon, 17 Jun 2019 20:06:37 -0700 Ivan Petkov wrote: > I tried deleting the gnu/packages/patches/rust-1.30-gdb-llvm.patch file since > it is now unused, but after doing so the build fails with a cryptic backtrace. > > Anyone have any ideas why? Hmm, I've had spooky things like that when I didn't run "make" in the guix directory after the change before trying to use it. Not sure why that is--since guile is supposed to compile on demand--, but it happened. So try running "make" in guix. Otherwise "grep -r gdb-llvm ." to find left-overs, if any. If nothing else helps, rm -rf ~/.cache/guile