disko: also build on macOS

https://github.com/nix-community/disko/blob/00395d188e3594a1507f214a2f15d4ce5c07cb28/package.nix

pkgs/by-name/di/disko/package.nix

@@ -7,6 +7,7 @@
   nix,
   nixos-install,
   coreutils,
+  xcp,
   testers,
 }:
 
@@ -26,17 +27,25 @@ stdenvNoCC.mkDerivation (finalAttrs: {
     mkdir -p $out/bin $out/share/disko
     cp -r install-cli.nix cli.nix default.nix disk-deactivate lib $out/share/disko
 
-    for i in disko disko-install; do
+    scripts=(disko)
+    ${lib.optionalString (!stdenvNoCC.isDarwin) ''
+      scripts+=(disko-install)
+    ''}
+
+    for i in "''${scripts[@]}"; do
       sed -e "s|libexec_dir=\".*\"|libexec_dir=\"$out/share/disko\"|" "$i" > "$out/bin/$i"
       chmod 755 "$out/bin/$i"
       wrapProgram "$out/bin/$i" \
         --set DISKO_VERSION "${finalAttrs.version}" \
         --prefix PATH : ${
-          lib.makeBinPath [
-            nix
-            coreutils
-            nixos-install
-          ]
+          lib.makeBinPath (
+            [
+              nix
+              coreutils
+              xcp
+            ]
+            ++ lib.optional (!stdenvNoCC.isDarwin) nixos-install
+          )
         }
     done
     runHook postInstall
@@ -45,7 +54,9 @@ stdenvNoCC.mkDerivation (finalAttrs: {
   installCheckPhase = ''
     runHook preInstallCheck
     $out/bin/disko --help
-    $out/bin/disko-install --help
+    ${lib.optionalString (!stdenvNoCC.isDarwin) ''
+      $out/bin/disko-install --help
+    ''}
     runHook postInstallCheck
   '';
 
@@ -60,7 +71,8 @@ stdenvNoCC.mkDerivation (finalAttrs: {
       mic92
       lassulus
       iFreilicht
+      Enzime
     ];
-    platforms = lib.platforms.linux;
+    platforms = lib.platforms.unix;
   };
 })