'substitute*' fails to patch a binary and returns the following error [...] starting phase `pre-configure' Backtrace: In ice-9/boot-9.scm: 2320: 19 [save-module-excursion #] 3966: 18 [#] 1645: 17 [%start-stack load-stack ...] 1650: 16 [#] In unknown file: ?: 15 [primitive-load "/nix/store/rcjkvdqp28dnp7igksnf3lzgwzxqvadb-ghc-bin-7.0.1-guile-builder"] In ice-9/eval.scm: 387: 14 [eval # ()] In srfi/srfi-1.scm: 830: 13 [every1 # ...] In /nix/store/04z6assixr4ms2fmvm2m42aw1a8k07x5-module-import/guix/build/gnu-build-system.scm: 368: 12 [# #] In ice-9/eval.scm: 432: 11 [eval # #] In srfi/srfi-1.scm: 616: 10 [for-each # #] In ice-9/boot-9.scm: 171: 9 [with-throw-handler #t ...] 793: 8 [call-with-input-file "inplace/bin/ghc-cabal" ...] In /nix/store/04z6assixr4ms2fmvm2m42aw1a8k07x5-module-import/guix/build/utils.scm: 336: 7 [# #] 361: 6 [# # ...] In srfi/srfi-1.scm: 465: 5 [fold # ...] In /nix/store/04z6assixr4ms2fmvm2m42aw1a8k07x5-module-import/guix/build/utils.scm: 364: 4 [# # ...] In ice-9/regex.scm: 189: 3 [list-matches # ...] 176: 2 [fold-matches # ...] In unknown file: ?: 1 [regexp-exec # ...] In ice-9/boot-9.scm: 106: 0 [# misc-error ...] ice-9/boot-9.scm:106:20: In procedure #: ice-9/boot-9.scm:106:20: string contains #\nul character: [...]