errno: fix cross compilation by not building *all* of moreutils

hosts/common/programs/errno.nix

@@ -1,7 +1,19 @@
 { pkgs, ... }:
 {
   sane.programs.errno = {
-    packageUnwrapped = pkgs.linkIntoOwnPackage pkgs.moreutils "bin/errno";
+    # packageUnwrapped = pkgs.linkIntoOwnPackage pkgs.moreutils "bin/errno";
+    # actually, don't build all of moreutils because not all of it builds for cross targets
+    packageUnwrapped = pkgs.moreutils.overrideAttrs (base: {
+      makeFlags = [
+        "BINS=errno"
+        "MANS=errno.1"
+        "PERLSCRIPTS=errno"  #< Makefile errors if empty, but this works :)
+      ];
+      installFlags = base.installFlags ++ [ "INSTALL_BIN=install" ];  #< cross fix; defaults `install -s`
+      #v disable the perl-specific stuff
+      propagatedBuildInputs = [];
+      postInstall = "";
+    });
 
     sandbox.method = "landlock";
   };