pkgs/d2: add unstable version

flake.nix

@@ -13,7 +13,7 @@
         final: prev:
           final.setAttrByPath [ name ] (mkPackage name prev);
 
-      allPackageNames = [ "d2" ];
+      allPackageNames = [ "d2" "d2_unstable" ];
       mkAllPackages = pkgs':
         listToAttrs
           (map

pkgs/d2_unstable.nix

@@ -0,0 +1,33 @@
+{ lib
+, buildGoModule
+, fetchFromGitHub
+, installShellFiles
+}:
+
+let version = "2022-11-30"; in
+
+buildGoModule {
+  pname = "d2";
+  inherit version;
+
+  src = fetchFromGitHub {
+    owner = "terrastruct";
+    repo = "d2";
+    rev = "e6c7d066164040098d294c00779a2248c402c864";
+    sha256 = "sha256-Qlm5i7l4/ZdVulXVOyry3cwZp7bIDbCXUZ5PngpD9bM=";
+  };
+
+  vendorSha256 = "sha256-yNaocc1iaOHlLqDLql+3XWL9j0RoxBXSWATi7QCNgJI=";
+
+  ldflags = [
+    "-s"
+    "-w"
+    "-X oss.terrastruct.com/d2/lib/version.Version=${version}"
+  ];
+
+  nativeBuildInputs = [ installShellFiles ];
+
+  postInstall = "installManPage ci/release/template/man/d2.1";
+
+  subPackages = [ "cmd/d2" ];
+}