use bash

.github/workflows/release.yml

@@ -1,8 +1,12 @@
 on:
   push:
-    branches: [ builds ]
+    branches:
+      - builds
+    tags:
+      - "v*.*.*"
   pull_request:
-    branches: [ builds ]
+    branches:
+      - builds
 jobs:
   release:
     env:
@@ -128,4 +132,5 @@ jobs:
         if: startsWith(github.ref, 'refs/tags/')
       - name: 'Itch.io release'
         run: './.github/workflows/scripts/butler_push.sh'
+        shell: bash
         if: startsWith(github.ref, 'refs/tags/')

.github/workflows/scripts/butler_push.sh

@@ -25,4 +25,4 @@ unzip butler.zip
 chmod +x ${butler_exe}
 # just a sanity check run (and also helpful in case you're sharing CI logs)
 ./${butler_exe} -V
-./${butler_exe} push build/Blades of Exile/ nqn/blades-of-exile:${butler_channel}
+./${butler_exe} push "build/Blades of Exile/" nqn/blades-of-exile:${butler_channel}