gns3Packages.{server,gui}Preview: 2.1.0rc3 -> 2.1.0rc4

pkgs/applications/networking/gns3/server.nix

@@ -4,7 +4,23 @@
 
 let
   pythonPackages = python3Packages;
-  yarl = if (!stable) then pythonPackages.yarl
+  # TODO: Not sure if all these overwrites are really required...
+  # Upstream seems to have some reasons (bugs, incompatibilities) though.
+  multidict_3_1_3 =
+    (stdenv.lib.overrideDerivation pythonPackages.multidict (oldAttrs:
+      rec {
+        pname = "multidict";
+        version = "3.1.3";
+        name = "${pname}-${version}";
+        src = pythonPackages.fetchPypi {
+          inherit pname version;
+          sha256 = "04kdxh19m41c6vbshwk8jfbidsfsqn7mn0abvx09nyg78sh80pw7";
+        };
+        doInstallCheck = false;
+      }));
+  yarl = if (!stable)
+    then (stdenv.lib.overrideDerivation pythonPackages.yarl (oldAttrs:
+      { propagatedBuildInputs = [ multidict_3_1_3 ]; }))
     else (stdenv.lib.overrideDerivation pythonPackages.yarl (oldAttrs:
       rec {
         pname = "yarl";
@@ -15,7 +31,19 @@ let
           sha256 = "1v2dsmr7bqp0yx51pwhbxyvzza8m2f88prsnbd926mi6ah38p0d7";
         };
       }));
-  aiohttp = if (!stable) then pythonPackages.aiohttp
+  aiohttp = if (!stable)
+    then (stdenv.lib.overrideDerivation pythonPackages.aiohttp (oldAttrs:
+      rec {
+        pname = "aiohttp";
+        version = "2.2.5";
+        name = "${pname}-${version}";
+        src = pythonPackages.fetchPypi {
+          inherit pname version;
+          sha256 = "1g6kzkf5in0briyscwxsihgps833dq2ggcq6lfh1hq95ck8zsnxg";
+        };
+        propagatedBuildInputs = [ yarl multidict_3_1_3 ]
+          ++ (with pythonPackages; [ async-timeout chardet ]);
+      }))
     else (stdenv.lib.overrideDerivation pythonPackages.aiohttp (oldAttrs:
       rec {
         pname = "aiohttp";
@@ -28,7 +56,9 @@ let
         propagatedBuildInputs = [ yarl ]
           ++ (with pythonPackages; [ async-timeout chardet multidict ]);
       }));
-  aiohttp-cors = if (!stable) then pythonPackages.aiohttp-cors
+  aiohttp-cors = if (!stable)
+    then (stdenv.lib.overrideDerivation pythonPackages.aiohttp-cors (oldAttrs:
+      { propagatedBuildInputs = [ aiohttp ]; }))
     else (stdenv.lib.overrideDerivation pythonPackages.aiohttp-cors (oldAttrs:
       rec {
         pname = "aiohttp-cors";