1 files changed, 2 insertions, 0 deletions
diff --git a/ruby/gengem.sh b/ruby/gengem.sh
index be9d14b..6c07be3 100755
--- a/ruby/gengem.sh
+++ b/ruby/gengem.sh
@@ -1,5 +1,7 @@
 #!/bin/sh
 
+mkdir -p gem/ext
+mkdir -p gem/msgpack
 cp extconf.rb       gem/ext/
 cp pack.c           gem/ext/
 cp pack.h           gem/ext/