diff --git a/script/test-user b/script/test-user
index 04dfce62..fcc4ce09 100755
--- a/script/test-user
+++ b/script/test-user
@@ -65,11 +65,19 @@ test() {
         --requirements /tmp/requirements.txt \
         --override /tmp/override.txt
 
-    read -r -d '' SCRIPT << EOF || :
+    if [ -z "$version" ]; then
+        # Packages with no __version__, skip version check
+        read -r -d '' SCRIPT << EOF || :
+import $package
+print('PASS: requirements $requirements')
+EOF
+    else
+        read -r -d '' SCRIPT << EOF || :
 import $package
 assert $package.__version__ == '$version', f'$package.__version__ is not $version: {$package.__version__}'
 print('PASS: requirements $requirements')
 EOF
+    fi
 
     docker run --rm \
         --volume "$PWD/src/monobase:/opt/r8/monobase:ro" \
@@ -106,9 +114,18 @@ test requests 2.28.1 'git+https://github.com/psf/requests@4d394574f5555a8ddcc38f
 
 # Local files
 rm -rf build/src/requests*
+
 curl -fsSL 'https://github.com/psf/requests/releases/download/v2.28.1/requests-2.28.1-py3-none-any.whl' -o build/src/requests-2.28.1-py3-none-any.whl
 test requests 2.28.1 './requests-2.28.1-py3-none-any.whl'
+test requests 2.28.1 '/src/requests-2.28.1-py3-none-any.whl'
+
 curl -fsSL 'https://github.com/psf/requests/archive/4d394574f5555a8ddcc38f707e0c9f57f55d9a3b.zip' -o build/src/requests.zip
 test requests 2.28.1 './requests.zip'
+test requests 2.28.1 '/src/requests.zip'
+
 git clone --depth 1 --branch v2.28.1 https://github.com/psf/requests.git build/src/requests.git
 test requests 2.28.1 './requests.git'
+test requests 2.28.1 '/src/requests.git'
+
+# youtokentome requires cython, has no __version__
+test youtokentome '' youtokentome==1.0.6
diff --git a/src/monobase/monogen.py b/src/monobase/monogen.py
index 32f3ace8..9396435a 100644
--- a/src/monobase/monogen.py
+++ b/src/monobase/monogen.py
@@ -21,11 +21,16 @@ def otel_attributes(self):
         return {f'monogen_{k}': str(v) for k, v in self.__dict__.items()}
 
 
-# uv venv --seed does not install deprecated setuptools or wheel for Python 3.12
-# Packaging is needed for flash-attn, etc.
-# Explicitly declare them here
-# Versions are not pinned and we will use whatever Torch index has
-SEED_PKGS = ['pip', 'packaging', 'setuptools', 'wheel']
+# Common build dependencies when installing packages in user layer
+# Base layer is exposed in PYTHONPATH so we don't need to install the same
+# pacakges in user layer with --no-build-isolation
+SEED_PKGS = [
+    'cython',
+    'pip',
+    'packaging',
+    'setuptools',
+    'wheel',
+]
 
 TEST_MONOGENS: list[MonoGen] = [
     MonoGen(