Pierre Neidhardt writes: > Is IO::All really missing from Guix? Turns out that the answer is yes. So I had to build 3 additional Perl packages before getting the tests to run. Now they fail with: Error open (<:raw:encoding(UTF-8)) on 'fortune--1.valgrind-log': No such file or directory at /gnu/store/4zvirlvdg6bibcs8pw6al6k57iif8v9n-perl-test-runvalgrind-0.2.0/lib/perl5/site_perl/5.26.1/Test/RunValgrind.pm line 120. When run manually with ./pre-inst-env guix environment fortune-mod -- make test all 4 tests pass. Any hint on how to investigate further? -- Pierre Neidhardt Support your right to arm bears!!