diff --git a/build b/build
index af2421d4a..17d2f5ccd 100755
--- a/build
+++ b/build
@@ -11,7 +11,4 @@ for dir in $DEVEL; do
   (cd $dir && make build BUILDFLAGS="$BUILDFLAGS")
 done
 
-# add build hash to outputs
-ver=$(cat meta/version)
-hash=$(cat meta/buildhash)
-(cd dist && rename "s/$ver/${ver}+$hash/" *.whl)
+helpers/rename-with-buildhash
diff --git a/helpers/rename-with-buildhash b/helpers/rename-with-buildhash
new file mode 100755
index 000000000..20663e129
--- /dev/null
+++ b/helpers/rename-with-buildhash
@@ -0,0 +1,9 @@
+#!/bin/bash
+
+# add buildhash to output files
+top=$(dirname $0)/..
+ver=$(cat $top/meta/version)
+hash=$(cat $top/meta/buildhash)
+rename "s/-${ver}-/-${ver}+${hash}-/" $top/dist/*
+
+