diff --git a/firefox.be0 b/firefox.be0
index acea0ec62..a85130117 100755
--- a/firefox.be0
+++ b/firefox.be0
@@ -39,7 +39,6 @@ mee_configure() {
 
 mee_build() {
     export CARGO_HOME=$B/.cargo
-    export MACH_USE_SYSTEM_PYTHON=1
     ${S}/mach build
 }