Bug#1126852: happy: /usr/share/happy-lib/HappyTemplate.hs: openFile: does not exist (No such file or directory)

[Adrian Bunk]

Package: happy
Version: 2.1.7-1
Severity: serious
Tags: ftbfs
Control: affects -1 src:haskell-language-javascript src:haskell-ogma-language-smv src:haskell-ogma-language-c src:haskell-ogma-language-lustre src:gtk2hs-buildtools src:haskell-language-c-quote

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/haskell-ogma-language-lustre.html
https://buildd.debian.org/status/fetch.php?pkg=haskell-ogma-language-lustre&arch=alpha&ver=1.11.0-2%2Bb1&stamp=1769909170&raw=0

...
happy: /usr/share/happy-lib/HappyTemplate.hs: openFile: does not exist (No such file or directory)
HasCallStack backtrace:
  collectBacktraces, called at libraries/ghc-internal/src/GHC/Internal/Exception.hs:169:13 in ghc-internal:GHC.Internal.Exception
  toExceptionWithBacktrace, called at libraries/ghc-internal/src/GHC/Internal/IO.hs:260:11 in ghc-internal:GHC.Internal.IO
  throwIO, called at libraries/ghc-internal/src/GHC/Internal/IO/Exception.hs:315:19 in ghc-internal:GHC.Internal.IO.Exception
  ioException, called at libraries/ghc-internal/src/GHC/Internal/IO/Exception.hs:319:20 in ghc-internal:GHC.Internal.IO.Exception


dh_auto_build: error: debian/hlibrary.setup build --builddir=dist-ghc returned exit code 1
make: *** [debian/rules:6: binary-arch] Error 25



I suspect this might be somehow related with the #1126033 fix.