$ ls -l `find -name c-ctype.h` -rwxr-xr-x. 1 rjones rjones 9647 Dec 3 2021 ./gnulib/lib/c-ctype.h $ chmod -x `find -name c-ctype.h` $ ls -l `find -name c-ctype.h` -rw-r--r--. 1 rjones rjones 9647 Dec 3 2021 ./gnulib/lib/c-ctype.h RPM builds actually gave a warning about this which is how I noticed the problem: *** WARNING: ./usr/src/debug/guestfs-tools-1.48.2-2.fc36.x86_64/gnulib/lib/c-ctype.h is executable but has no shebang, removing executable bit (cherry picked from guestfs-tools commit 566267a3d447eb97b4a0637adbe3e45c09ba090f)