Attempting to build a trivial Haskell program using ghc fails, as the linker cannot find the rt library:
``` ~ $ ghc -O2 test.hs Linking test ... /home/a/.guix-profile/bin/ld: cannot find -lrt: No such file or directory collect2: error: ld returned 1 exit status `gcc' failed in phase `Linker'. (Exit code: 1) ``` Glibc and gcc-toolchain are installed in the profile, and ~/.guix-profile/lib/librt.so.1 exists. Maybe this is related to this new bug, or the recent core-updates merge? https://issues.guix.gnu.org/63238
