diff --git a/steps-guix/improve/guix-daemon-and-pull.sh b/steps-guix/improve/guix-daemon-and-pull.sh
index c0774907..db4f6358 100644
--- a/steps-guix/improve/guix-daemon-and-pull.sh
+++ b/steps-guix/improve/guix-daemon-and-pull.sh
@@ -221,6 +221,7 @@ done
 if [ ! -S "${daemon_socket}" ]; then
     guix-daemon \
         --build-users-group=guixbuild \
+        --no-substitutes \
         --listen="${daemon_socket}" \
         >/tmp/guix-daemon.log 2>&1 &
 fi