tweak the invocation slightly

diff --git a/run_make b/run_make
index f26bcfc2022a2e074ece383996222ce2dd29529f..ed5e03473ddc71c8c957235ee15a0bb23833c0c4 100755 (executable)
--- a/run_make
+++ b/run_make
@@ -1,9 +1,9 @@
 #!/bin/bash
 
-MAKE_OPTS=
+MAKE_OPTS=""
 
 if [ -n "$MAKE_PARALLEL" ]; then
-    MAKE_OPTS=-j "$MAKE_PARALLEL"
+    MAKE_OPTS="-j$MAKE_PARALLEL";
 fi;
 if [ -n "$MAKE_TARGET" ]; then
     make $MAKE_OPTS "$MAKE_TARGET";