diff --git a/pkgs/build-support/rust/hooks/maturin-build-hook.sh b/pkgs/build-support/rust/hooks/maturin-build-hook.sh
index 41b313280d70..62d5619660c6 100644
--- a/pkgs/build-support/rust/hooks/maturin-build-hook.sh
+++ b/pkgs/build-support/rust/hooks/maturin-build-hook.sh
@@ -24,8 +24,6 @@ maturinBuildHook() {
         ${maturinBuildFlags-}
     )
 
-    runHook postBuild
-
     if [ ! -z "${buildAndTestSubdir-}" ]; then
         popd
     fi
@@ -34,6 +32,9 @@ maturinBuildHook() {
     mkdir -p dist
     mv target/wheels/*.whl dist/
 
+    # These are python build hooks and may depend on ./dist
+    runHook postBuild
+
     echo "Finished maturinBuildHook"
 }
 
diff --git a/pkgs/servers/matrix-synapse/plugins/rendezvous.nix b/pkgs/servers/matrix-synapse/plugins/rendezvous.nix
index fe1f2469ef2d..c15c24681a2c 100644
--- a/pkgs/servers/matrix-synapse/plugins/rendezvous.nix
+++ b/pkgs/servers/matrix-synapse/plugins/rendezvous.nix
@@ -29,13 +29,8 @@ buildPythonPackage rec {
     maturinBuildHook
   ]);
 
-  preBuild = ''
-    cd synapse
-  '';
+  buildAndTestSubdir = "synapse";
 
-  postBuild = ''
-    cd ..
-  '';
 
   pythonImportsCheck = [ "matrix_http_rendezvous_synapse" ];