diff --git a/app/containers/lsl/ympbuild b/app/containers/lsl/ympbuild
index dedc035f..cbcdd54d 100644
--- a/app/containers/lsl/ympbuild
+++ b/app/containers/lsl/ympbuild
@@ -20,6 +20,10 @@ arch=('x86_64')
 
 cd debian-subsystem-$version
 
+export CFLAGS=""
+export CXXFLAGS=""
+
+
 build () {
     # parallel job build and install is not supported.
     make