diff --git a/etc/ci/buildbot_steps.yml b/etc/ci/buildbot_steps.yml
index d4175052fd1..1d788f9e55f 100644
--- a/etc/ci/buildbot_steps.yml
+++ b/etc/ci/buildbot_steps.yml
@@ -128,4 +128,4 @@ windows-gnu-nightly:
 windows-msvc-nightly:
   - mach.bat build --release
   - mach.bat package --release
-  - .\etc\ci\upload_nightly.sh windows-msvc
+  - bash -l ./etc/ci/upload_nightly.sh windows-msvc