Without the change the build fails as https://hydra.nixos.org/build/310775846: ld: libs/libz.a(deflate.o): relocation R_X86_64_32S against `.rodata' can not be used when making a PIE object; recompile with -fPIE ld: failed to set dynamic section sizes: bad value It happens because `libs/libz.a` comes from a "source" tarball. As some libraries are not packaged in `nixpkgs` let's fall back to `-no-pie`. Co-authored-by: Justin Bedő <cu@cua0.org>