diff --git a/pkgs/epnix/tools/phoebus/setup-hook/setup-hook.sh b/pkgs/epnix/tools/phoebus/setup-hook/setup-hook.sh
index 8424e954..0da6610d 100644
--- a/pkgs/epnix/tools/phoebus/setup-hook/setup-hook.sh
+++ b/pkgs/epnix/tools/phoebus/setup-hook/setup-hook.sh
@@ -31,5 +31,5 @@ installPhoebusJar() {
 		--set-default JAVA_XMX "4G" \
 		--add-flags '-Xms$JAVA_XMS' \
 		--add-flags '-Xmx$JAVA_XMX' \
-		--add-flags "-D${D[@]}"
+		--add-flags "-Dfile.encoding=UTF-8"
 }