diff --git a/pkgs/servers/http/nginx/generic.nix b/pkgs/servers/http/nginx/generic.nix
index e13c0b4e922..ecbf8071d61 100644
--- a/pkgs/servers/http/nginx/generic.nix
+++ b/pkgs/servers/http/nginx/generic.nix
@@ -119,15 +119,15 @@ stdenv.mkDerivation {
     ./nix-skip-check-logs-path.patch
   ] ++ optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
     (fetchpatch {
-      url = "https://raw.githubusercontent.com/openwrt/packages/master/net/nginx/patches/102-sizeof_test_fix.patch";
+      url = "https://raw.githubusercontent.com/openwrt/packages/c057dfb09c7027287c7862afab965a4cd95293a3/net/nginx/patches/102-sizeof_test_fix.patch";
       sha256 = "0i2k30ac8d7inj9l6bl0684kjglam2f68z8lf3xggcc2i5wzhh8a";
     })
     (fetchpatch {
-      url = "https://raw.githubusercontent.com/openwrt/packages/master/net/nginx/patches/101-feature_test_fix.patch";
+      url = "https://raw.githubusercontent.com/openwrt/packages/c057dfb09c7027287c7862afab965a4cd95293a3/net/nginx/patches/101-feature_test_fix.patch";
       sha256 = "0v6890a85aqmw60pgj3mm7g8nkaphgq65dj4v9c6h58wdsrc6f0y";
     })
     (fetchpatch {
-      url = "https://raw.githubusercontent.com/openwrt/packages/master/net/nginx/patches/103-sys_nerr.patch";
+      url = "https://raw.githubusercontent.com/openwrt/packages/c057dfb09c7027287c7862afab965a4cd95293a3/net/nginx/patches/103-sys_nerr.patch";
       sha256 = "0s497x6mkz947aw29wdy073k8dyjq8j99lax1a1mzpikzr4rxlmd";
     })
   ] ++ mapModules "patches");
diff --git a/pkgs/servers/matrix-synapse/default.nix b/pkgs/servers/matrix-synapse/default.nix
index bc789dac977..e09bfab90f7 100644
--- a/pkgs/servers/matrix-synapse/default.nix
+++ b/pkgs/servers/matrix-synapse/default.nix
@@ -24,11 +24,11 @@ let
 in
 with py.pkgs; buildPythonApplication rec {
   pname = "matrix-synapse";
-  version = "1.42.0";
+  version = "1.43.0";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "sha256-wJFjjm9apRqjk5eN/kIEgecHgm/XLbtwXHEpM2pmvO8=";
+    sha256 = "sha256-t3ZXtEq/sHYymta4gYfmdBzpExyxepGQ4lzvZii2Q70=";
   };
 
   patches = [
@@ -78,7 +78,7 @@ with py.pkgs; buildPythonApplication rec {
   doCheck = !stdenv.isDarwin;
 
   checkPhase = ''
-    PYTHONPATH=".:$PYTHONPATH" ${python3.interpreter} -m twisted.trial tests
+    PYTHONPATH=".:$PYTHONPATH" ${python3.interpreter} -m twisted.trial -j $NIX_BUILD_CORES tests
   '';
 
   passthru.tests = { inherit (nixosTests) matrix-synapse; };