Revert some GMP stuff

config.nix

@@ -1,8 +0,0 @@
-{
-  packageOverrides = pkgs: {
-    gmp = pkgs.gmp.override { postInstall = ''
-      ln -s /usr/local/opt/gmp/lib/libgmp.10.dylib $out/lib/libgmp.10.dylib
-      '';
-    };
-  };
-}

darwin-configuration.nix

@@ -1,9 +1,13 @@
-{ config, lib, ... }:
-
-let pkgs = import <nixpkgs> { config = import ./config.nix; }; in
+{ config, lib, pkgs, ... }:
 
 let python = import ./python.nix { inherit pkgs; }; in
 
+let gmp =
+  #if pkgs.stdenv.isDarwin then
+      import ./gmp.nix { inherit pkgs; }
+  #else pkgs.gmp
+  ; in
+
 {
 
   nix.useDaemon = true;
@@ -22,8 +26,7 @@ let python = import ./python.nix { inherit pkgs; }; in
       pkgs.rustc
       pkgs.cargo
       pkgs.clang
-      pkgs.gmp
-      pkgs.darwin.apple_sdk.frameworks.Foundation
+      gmp
       python
       #pkgs.keepassxc
     ];

gmp.nix

@@ -0,0 +1,14 @@
+{ pkgs ? import <nixpkgs> {} }:
+
+# If this fails, `chmod -R a+rw /usr/local/opt/gmp/lib`
+pkgs.stdenv.mkDerivation {
+    name = "gmp-symlink";
+    builder = "${pkgs.bash}/bin/bash";
+    args = ["-c" "${pkgs.coreutils}/bin/mkdir -p $out && ${pkgs.coreutils}/bin/touch $out/gmp-symlink"];
+    system = "x86_64-darwin";
+    postInstall =
+    ''
+    ${pkgs.coreutils}/bin/echo "hi!"
+    ${pkgs.coreutils}/bin/ln -s ${pkgs.gmp}/lib/libgmp.10.dylib /usr/local/opt/gmp/lib/libgmp.10.dylib
+    '';
+}

home.nix

@@ -35,6 +35,7 @@
       pkgs.handbrake
       pkgs.ripgrep
       pkgs.elan
+      pkgs.coreutils-prefixed
     ];
 
   programs.vscode = {
@@ -111,7 +112,7 @@ let g:syntastic_always_populate_loc_list = 1
 let g:syntastic_auto_loc_list = 1
 let g:syntastic_check_on_open = 1
 let g:syntastic_check_on_wq = 0''; }
-    
+
     YouCompleteMe
     tagbar
   ];

result

@@ -0,0 +1 @@
+/nix/store/gfc3ba816plnkzix49frmjg0729h58rn-gmp-symlink