diff --git a/docker/services/swh-web/entrypoint.sh b/docker/services/swh-web/entrypoint.sh
--- a/docker/services/swh-web/entrypoint.sh
+++ b/docker/services/swh-web/entrypoint.sh
@@ -5,16 +5,6 @@
 source /srv/softwareheritage/utils/pgsql.sh
 setup_pgsql
 
-# when overriding swh-web sources only
-if [[ -d /src/swh-web ]] ; then
-    echo "Install and compile swh-web static assets"
-    pushd /src/swh-web
-    yarn install --frozen-lockfile
-    # execute webpack-dev-server in background
-    yarn start-dev&
-    popd
-fi
-
 source /srv/softwareheritage/utils/pyutils.sh
 setup_pip
 
diff --git a/docker/utils/pyutils.sh b/docker/utils/pyutils.sh
--- a/docker/utils/pyutils.sh
+++ b/docker/utils/pyutils.sh
@@ -1,6 +1,5 @@
 #!/bin/bash
 
-
 setup_pip () {
   echo Using pip from $(which pip)
 
@@ -8,19 +7,23 @@
     tmpdir=`mktemp -d`
     pushd /src
     for srcrepo in swh-* ; do
-      if [ -w $srcrepo ]
-      then
-        # Install package in editable mode if source directory is writable
-        pip install -e $srcrepo
-      else
+      if [ ! -w $srcrepo ]; then
         # Source directories might not be writeable, but building them writes
         # in-tree; so we're copying them to a location guaranteed to be writeable.
         rsync -a --chmod=+w $srcrepo $tmpdir/ --exclude "*/__pycache__/" --exclude "*/.tox/" --exclude "*/.hypothesis/"
-        pip install $tmpdir/$srcrepo
+        pushd $tmpdir/$srcrepo
+      else
+        pushd $srcrepo
+      fi
+      if [ -f package.json ]; then
+        yarn install --frozen-lockfile
+        yarn build-dev
       fi
+      # Install package in editable mode if source directory is writable
+      pip install -e .
+      popd
     done
     popd
-    rm -rf $tmpdir
   fi
 
   echo Installed Python packages: