diff --git a/tools/setup-binutils.sh b/tools/setup-binutils.sh
index 9b952131..e7f59b03 100755
--- a/tools/setup-binutils.sh
+++ b/tools/setup-binutils.sh
@@ -36,6 +36,8 @@ cd toolchain/build/binutils
 
 unset CC
 unset CXX
+unset LD
+unset AR
 
 ../binutils-$LUNA_BINUTILS_VERSION_REQUIRED/configure --prefix="$BUILD_PREFIX" --target=$BUILD_TARGET --disable-nls --with-sysroot=$BUILD_SYSROOT --disable-werror | filter-lines "binutils" "configure"