diff --git a/stage4/04-pisdr-system/03-run.sh b/stage4/04-pisdr-system/03-run.sh
index b25e8c8..946d0ed 100755
--- a/stage4/04-pisdr-system/03-run.sh
+++ b/stage4/04-pisdr-system/03-run.sh
@@ -1,5 +1,6 @@
 #!/bin/bash -e
 
 on_chroot << EOF
-pip3 install cmake ninja
+python3 -m pip install cmake
+python3 -m pip install ninja
 EOF