As reported at <https://lists.gnu.org/archive/html/guix-devel/2021-08/msg00127.html>, Autoconf’s config.{guess,sub} (installed by running ‘autoconf -i’ or similar) have patched shebangs, making them unsuitable on non-Guix systems:
--8<---------------cut here---------------start------------->8--- $ head -1 $(find $(guix build autoconf) -name config.guess) #!/gnu/store/pwcp239kjf7lnj5i4lkdzcfcxwcfyk72-bash-minimal-5.0.16/bin/sh $ head -1 $(find $(guix build autoconf) -name config.sub) #!/gnu/store/pwcp239kjf7lnj5i4lkdzcfcxwcfyk72-bash-minimal-5.0.16/bin/sh --8<---------------cut here---------------end--------------->8--- We should copy the ‘unpatch-shebangs’ phase from automake, added in response to <https://issues.guix.gnu.org/14201>. Ludo’.
