Cross compile minimal NixOS to aarch64
I wish I knew how to cross-build RPi images using 18.09.
I gather some things have changed with cross-compilation in 18.09, and I think cross-compilation got simpler, but I can't figure it out.
I rebased your nixpkgs branch on release-18.09, and also tried without that override, but I seem to get a perl error:
nix-build -I nixpkgs=https://github.com/paulreimer/nixpkgs/archive/cross-nixos-aarch64-1.tar.gz system.nix -A config.system.build.sdImage -o sdImage
...
/nix/store/jsrwk2mmhns5qvkh3y9wwdlqnrf7r7ya-nixos-sd-image-18.09.2327.37694c8cc0e-aarch64-linux.img-aarch64-unknown-linux-gnu.drv
building
...
Checking perl version ... perl5-5.28.1
No patchset found for perl5-5.28.1 in cnf/diffs
This perl version is probably not supported by perl-cross
ERROR: configure --mode=buildmini failed
checking for stdint.h... yes
builder for '/nix/store/xm914bxrz8ykfbg3xl56swy0jbimndxj-perl-5.28.1-aarch64-unknown-linux-gnu.drv' failed with exit code 255
cannot build derivation '/nix/store/anwd62j7wcyh8i08srbzahlw9dlp1hg7-nixos-system-nixos-18.09.2327.37694c8cc0e-aarch64-unknown-linux-gnu.drv': 1 dependencies couldn't be built
cannot build derivation '/nix/store/jsrwk2mmhns5qvkh3y9wwdlqnrf7r7ya-nixos-sd-image-18.09.2327.37694c8cc0e-aarch64-linux.img-aarch64-unknown-linux-gnu.drv': 1 dependencies couldn't be built
error: build of '/nix/store/jsrwk2mmhns5qvkh3y9wwdlqnrf7r7ya-nixos-sd-image-18.09.2327.37694c8cc0e-aarch64-linux.img-aarch64-unknown-linux-gnu.drv' failed
@Mic92 I was trying to use your fork, but it failed to build because of texinfo.
../tools/info/makedoc ./session.c ./echo-area.c ./infodoc.c ./m-x.c ./indices.c ./nodemenu.c ./footnotes.c ./variables.c
/nix/store/dkh7l9a4sx7zqh8riqbj3z21sz25p8xy-bash-4.4-p23/bin/bash: ../tools/info/makedoc: No such file or directory
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