Forwarded to https://gitlab.haskell.org/ghc/ghc/-/issues/10424 To-Do: Evaluate if this patch is actually still needed. See: https://gitlab.haskell.org/ghc/ghc/-/issues/10424#note_453670 diff -upr ghc-9.4.3.orig/compiler/GHC/Iface/Recomp.hs ghc-9.4.3/compiler/GHC/Iface/Recomp.hs --- ghc-9.4.3.orig/compiler/GHC/Iface/Recomp.hs 2022-11-09 17:50:53.003678568 +0100 +++ ghc-9.4.3/compiler/GHC/Iface/Recomp.hs 2022-11-09 17:53:50.484112012 +0100 @@ -1231,7 +1231,7 @@ addFingerprints hsc_env iface0 (mod_hash, mi_src_hash iface0, ann_fn (mkVarOcc "module"), -- See mkIfaceAnnCache - mi_usages iface0, + usages, sorted_deps, mi_hpc iface0) @@ -1266,6 +1266,8 @@ addFingerprints hsc_env iface0 (non_orph_rules, orph_rules) = mkOrphMap ifRuleOrph (mi_rules iface0) (non_orph_fis, orph_fis) = mkOrphMap ifFamInstOrph (mi_fam_insts iface0) ann_fn = mkIfaceAnnCache (mi_anns iface0) + -- Do not allow filenames to affect the interface + usages = [ case u of UsageFile _ fp _ -> UsageFile "" fp Nothing; _ -> u | u <- mi_usages iface0 ] -- | Retrieve the orphan hashes 'mi_orphan_hash' for a list of modules -- (in particular, the orphan modules which are transitively imported by the