diff --git a/projects/spidermonkey/build.sh b/projects/spidermonkey/build.sh
index 042a741fc..55971eb5f 100755
--- a/projects/spidermonkey/build.sh
+++ b/projects/spidermonkey/build.sh
@@ -19,9 +19,6 @@
 export SHELL=/bin/bash
 ../../mach bootstrap --no-interactive --application-choice browser
 
-# Set environment for rustc.
-source $HOME/.cargo/env
-
 autoconf2.13
 
 mkdir build_DBG.OBJ