diff --git a/configure b/configure
index c36b210..92ac8ed 100755
--- a/configure
+++ b/configure
@@ -6,7 +6,7 @@ do
 # specify with --prefix "/whatever"
         --prefix)
         export PREFIX="$2"
-        sed "s#PREFIX := /usr/local#PREFIX := $2#g" Makefile | tee Makefile
+        sed "s#PREFIX := /usr/local#PREFIX := $2#g" Makefile | tee Makefile > /dev/null
         shift # Remove argument name from processing
         shift # Remove argument value from processing
         ;;
@@ -14,8 +14,8 @@ do
 # specify with --libdir "/libwhatver"
         --libdir)
         export LIBDIR="$2"
-        sed "s#LIBDIR := /lib#LIBDIR := $2#g" Makefile | tee Makefile
-        sed "s#LIB_DIR = \'/lib\'#LIB_DIR = \'$2\'#g" app.py | tee app.py
+        sed "s#LIBDIR := /lib#LIBDIR := $2#g" Makefile | tee Makefile > /dev/null
+        sed "s#LIB_DIR = [\']/lib[\']#LIB_DIR = \'$2\'#g" app.py | tee app.py > /dev/null
         shift
         shift
         ;;