let nixpkgs = import ; nixpkgs0 = nixpkgs { crossSystem = (import {}).lib.systems.examples.musl64; overlays = [(self: super: { musl = self.stdenv.mkDerivation { name = "musl-includeos"; src = builtins.fetchGit { url = "git://git.musl-libc.org/musl/"; ref = "v1.1.18"; }; # FIXME: don't hardcode! prePatch = '' cp /home/manu/vcs/IncludeOS/api/syscalls.h src/internal/includeos_syscalls.h cp /home/manu/vcs/IncludeOS/etc/musl/syscall.h src/internal/ rm -f arch/x86_64/syscall_arch.h rm -f arch/i386/syscall_arch.h ''; patches = [ # FIXME: don't hardcode? ../etc/musl/musl.patch ../etc/musl/endian.patch ]; configureFlags = [ "--disable-shared" "--enable-debug" ]; }; })]; }; in nixpkgs0.pkgs.libcxx