I cannot reproduce it (x86_64): --8<---------------cut here---------------start------------->8--- $ git describe v0.8.2-302-g4a3bcae $ ./pre-inst-env guix build cloog --no-substitutes
[...] /gnu/store/k1wj5rwkipzqq2gg55s4p5baxhxzzy8h-cloog-0.18.0 --8<---------------cut here---------------end--------------->8--- Could you try to build it from the same Guix commit? (You mentioned on IRC having non-deterministic Gettext test failures. For now, you could work around them either by retrying upon failure, or by enabling substitutes.) TIA, Ludo’.