diff --git a/debian/Dockerfile b/debian/Dockerfile
index 60d2306..ab9ffe4 100644
--- a/debian/Dockerfile
+++ b/debian/Dockerfile
@@ -13,11 +13,20 @@ ARG BUILD_PLATFORM=linux/amd64
 ARG PYTHON_VERSION=3.14
 ARG OS_VERSION=trixie
 ARG NODE_VERSION=24
+ARG PNPM_VERSION=latest-10
+ARG INVENIO_WEBPACKEXT_NPM_PKG_CLS=pynpm:PNPMPackage
 
 FROM --platform=${BUILD_PLATFORM} python:${PYTHON_VERSION}-${OS_VERSION}
 
 LABEL org.opencontainers.image.source=https://github.com/inveniosoftware/docker-invenio
 
+# ARGs declared before FROM are only global defaults. Redeclare build args in
+# the stage where they are used so passed values are in scope:
+# https://docs.docker.com/build/building/variables/#scoping
+ARG NODE_VERSION
+ARG PNPM_VERSION
+ARG INVENIO_WEBPACKEXT_NPM_PKG_CLS
+
 ENV \
     WORKING_DIR=/opt/invenio \
     INVENIO_INSTANCE_PATH=/opt/invenio/var/instance \
@@ -74,10 +83,9 @@ RUN \
         fonts-dejavu \
         locales \
         nodejs \
-        npm \
     && \
     # Install pnpm
-    npm install -g pnpm@latest-10
+    npm install -g pnpm@${PNPM_VERSION}
 
 # Setup uv
 # From https://docs.astral.sh/uv/guides/integration/docker/