diff --git a/scripts/makedeb.sh b/scripts/makedeb.sh
index 68e6fbd78..8a8d843dc 100755
--- a/scripts/makedeb.sh
+++ b/scripts/makedeb.sh
@@ -43,7 +43,7 @@ bindir="bin.linux.release"
 builddir="build.linux.release" 
 libdir="/usr/lib/klayout"
 
-./build.sh -j4 \
+./build.sh -j1 \
            -bin $bindir \
            -build $builddir \
            -rpath $libdir