fixup! Fix build command

.travis.yml

@@ -44,16 +44,18 @@ script:
   - |
     if [[ $TOXENV == "build" ]]; then
       exactly_one() {
-        value=$(find . -iwholename $1 | wc -l)
-        if [ $value -neq 1 ]; then
+        value=$(find dist -iname $1 | wc -l)
+        if [ $value -ne 1 ]; then
           echo "Found $value instances of $1, not 1"
-          exit 1
+          return 1
+        else
+          echo "Found exactly 1 instance of $value"
         fi
       }
 
       # Check that exactly one tarball and one wheel are created
-      exactly_one 'dist/*.tar.gz'
-      exactly_one 'dist/*.whl'
+      exactly_one '*.tar.gz'
+      exactly_one '*.whl'
     fi
 
 after_success: