Merge pull request #98 from samueldr-wip/feature/cross-rootfs

Add workarounds to enable minimal rootfs cross-compilation.

modules/cross-workarounds.nix

@@ -0,0 +1,21 @@
+{ lib, config, ... }:
+
+# This module adds system-level workarounds when cross-compiling.
+# These workarounds are only expected to be implemented for the *basic* build.
+# That is `nix-build ./default.nix`, without additional configuration.
+let
+  isCross =
+    config.nixpkgs.crossSystem != null &&
+    config.nixpkgs.localSystem.system != null &&
+    config.nixpkgs.crossSystem.system != config.nixpkgs.localSystem.system;
+in
+lib.mkIf isCross
+{
+  # building '/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-fc-cache.drv'...
+  # [...]-fontconfig-2.10.2-aarch64-unknown-linux-gnu-bin/bin/fc-cache: cannot execute binary file: Exec format error
+  fonts.fontconfig.enable = false;
+
+  # building '/nix/store/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-mesa-19.3.3-aarch64-unknown-linux-gnu.drv'...
+  # meson.build:1537:2: ERROR: Dependency "wayland-scanner" not found, tried pkgconfig
+  security.polkit.enable = false;
+}

modules/module-list.nix

@@ -8,6 +8,7 @@
   ./_nixos-disintegration
   ./adb.nix
   ./boot-initrd.nix
+  ./cross-workarounds.nix
   ./hardware-generic.nix
   ./hardware-qualcomm.nix
   ./hardware-ram.nix