diff --git a/build.sh b/build.sh
index 5a993223..834365d9 100755
--- a/build.sh
+++ b/build.sh
@@ -21,10 +21,15 @@ for sch in $PROJECT/rules/sch/*.sch; do
     docker run --rm -i -v $PROJECT:/src -v $PROJECT/target/schematron:/target klakegg/schematron prepare /src/rules/sch/$(basename $sch) /target/$(basename $sch)
 done
 
+# Show permissions
+ls -Rla
 # Fix ownership
 docker run --rm -i -v $PROJECT:/src alpine:3.6 chown -R $(id -g $USER).$(id -g $USER) /src/target
 
-rm -rf $PROJECT/target/site/files/PEPPOLBIS-Upgrade-Schematron.zip
+# Show permissions
+ls -Rla
+
+sudo rm -rf $PROJECT/target/site/files/PEPPOLBIS-Upgrade-Schematron.zip
 zip -r $PROJECT/target/site/files/PEPPOLBIS-Upgrade-Schematron.zip target/schematron
 
 # Example files