python3Packages.matrix-nio: permit insecure Olm during check phase

Olm has a known vulnerability (#334638) but is only an optional
dependency of nio, so in theory nio should by default be unaffected.
nio’s tests, however, cover its full suite of extra features, so Olm is
still evaluated as a dependency of the check phase. Since the check
phase doesn’t process user data or access the network this vulnerability
isn’t relevant and can be ignored, allowing nio to evaluate and
ultimately be run without Olm.

pkgs/development/python-modules/matrix-nio/default.nix

@@ -40,6 +40,21 @@
   zulip,
 }:
 
+let
+  permitInsecureOlm = map (
+    pythonPackage:
+    pythonPackage.override (
+      lib.optionalAttrs (pythonPackage.pname == "python-olm") (
+        let
+          olm = lib.findFirst (p: p.pname == "olm") null pythonPackage.buildInputs;
+        in
+        {
+          olm = olm.overrideAttrs (lib.addMetaAttrs { knownVulnerabilities = [ ]; });
+        }
+      )
+    )
+  );
+in
 buildPythonPackage rec {
   pname = "matrix-nio";
   version = "0.24.0";
@@ -83,7 +98,7 @@ buildPythonPackage rec {
     pytest-aiohttp
     pytest-benchmark
     pytestCheckHook
-  ] ++ passthru.optional-dependencies.e2e;
+  ] ++ permitInsecureOlm passthru.optional-dependencies.e2e;
 
   pytestFlagsArray = [ "--benchmark-disable" ];