gns3Packages.{server,gui}Preview: 2.1.12 -> 2.2.0a1

pkgs/applications/networking/gns3/default.nix

@@ -2,8 +2,7 @@
 
 let
   stableVersion = "2.1.12";
-  # Currently there is no preview version.
-  previewVersion = stableVersion;
+  previewVersion = "2.2.0a1";
   addVersion = args:
     let version = if args.stable then stableVersion else previewVersion;
         branch = if args.stable then "stable" else "preview";
@@ -19,7 +18,7 @@ in {
   };
   guiPreview = mkGui {
     stable = false;
-    sha256Hash = guiSrcHash;
+    sha256Hash = "16jjgfbdi7b3349wrqalf40qcaqzw3d4vdjbwcy8dbqblg48hn5w";
   };
 
   serverStable = mkServer {
@@ -28,6 +27,6 @@ in {
   };
   serverPreview = mkServer {
     stable = false;
-    sha256Hash = serverSrcHash;
+    sha256Hash = "0bcsjljy947grfn3y9xyi3dbzdw5wkljq1nr66cqfkidx9f4fzni";
   };
 }