diff --git a/docker/webapp/build.sh b/docker/webapp/build.sh
index 5cd5e4d5..678149b8 100755
--- a/docker/webapp/build.sh
+++ b/docker/webapp/build.sh
@@ -1,30 +1,33 @@
 #!/bin/bash
 set -e
 set -x
 
+echo -e "Building with the following ulimit: limit: $(ulimit -n)\n"
+echo -e "If you run into EMFILE errors, this is the reason"
+
 mkdir /src
 cd /src
 
 git clone --branch $GIT_REF https://git.kolab.org/source/kolab.git kolab
 pushd kolab
 git reset --hard $GIT_REF
 popd
 
 rmdir /opt/app-root/src
 cp -a kolab/src /opt/app-root/src
 cd /opt/app-root/src/
 
 mkdir -p storage/framework/{sessions,views,cache}
 mkdir -p database/seeds
 
 php -dmemory_limit=-1 $(command -v composer) install
 npm -g install npm
 /usr/local/bin/npm install
 ./artisan storage:link
 ./artisan clear-compiled
 ./artisan horizon:install
 if [ ! -f 'resources/countries.php' ]; then
     ./artisan data:countries
 fi
 
 /usr/local/bin/npm run dev