Description of changes

This fixes #245162.

I also tested this change in the same file:

    dynamicLinker =
-     /**/ if sharedLibraryLoader == null then ""
+     /**/ if sharedLibraryLoader == null then null
...
-     else "";
+     else null;

Which is a partial revert of 238a605, which worked, but I don't know the use behind that change (@Artturin) so I'm just proposing this quick fix.

Here's the test file I'm using:

let
  nixpkgs = ./.;

  pkgs = import nixpkgs {};
  inherit (pkgs) lib;

  crossSystem = lib.systems.examples.ppc64;

  pkgsCross = import nixpkgs {
    inherit crossSystem;
  };

  inherit (pkgsCross) hello;
  emulator = (lib.systems.elaborate crossSystem).emulator pkgs;
in
  pkgs.runCommand "test-cross" {} ''
    ${emulator} ${hello}/bin/hello | tee $out
  ''

Things done

• Built on platform(s)
  • cross x86_64-linux -> ppc64
  • cross x86_64-linux -> powernv
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• Fits CONTRIBUTING.md.