Repin wine to 3.21 as file access from TH breaks otherwise (#1508)

Fixes #1487

overlays/default.nix

@@ -2,6 +2,7 @@
 
 let
   overlays = {
+    wine = import ./wine.nix;
     #ghcjs = import ./ghcjs-asterius-triple.nix;
     #python = import ./python.nix;
     haskell = import ./haskell.nix args;
@@ -38,6 +39,7 @@ let
       haskellPackages = { };
       haskell-nix-prev = prev;
     })
+    wine
     haskell
     hackage-quirks
     bootstrap

overlays/wine.nix

@@ -0,0 +1,16 @@
+# fix wine at 3.0.2; the 4.x branch breaks windows cross compilation.
+# this will inevitably replace *any* wine version. Thus this might not
+# really be what we ultimately want.
+final: prev:
+{
+    winePackages = prev.winePackages // {
+        minimal = prev.winePackages.minimal.overrideAttrs (oldAttrs: {
+            name = "wine-3.21";
+            version = "3.21";
+            src = prev.fetchurl {
+            url = "https://dl.winehq.org/wine/source/3.x/wine-3.21.tar.xz";
+            sha256 = "1h70wb7kysbzv36i3fblyiihvalwhy6sj4s2a8nf21nz2mhc0k58"; };
+            patches = [];
+            });
+        };
+}