diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index 6794994..96643ba 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -93,7 +93,11 @@ jobs:
         uses: lukka/get-cmake@latest
 
       - name: Configure, build, test, verify
-        shell: pwsh
+        # Windows PowerShell (powershell.exe), not PowerShell Core (pwsh) --
+        # this self-hosted runner does not have pwsh installed, only the
+        # in-box Windows PowerShell 5.1 the original inline steps implicitly
+        # ran under.
+        shell: powershell
         run: ./.gitea/scripts/windows-build.ps1
 
       - name: Upload plugin
diff --git a/.gitea/workflows/release.yml b/.gitea/workflows/release.yml
index 673766e..cb66b3f 100644
--- a/.gitea/workflows/release.yml
+++ b/.gitea/workflows/release.yml
@@ -131,11 +131,14 @@ jobs:
         uses: lukka/get-cmake@latest
 
       - name: Configure, build, test, verify
-        shell: pwsh
+        # Windows PowerShell (powershell.exe), not PowerShell Core (pwsh) --
+        # this self-hosted runner does not have pwsh installed. See the same
+        # note in build.yml.
+        shell: powershell
         run: ./.gitea/scripts/windows-build.ps1
 
       - name: Package archive
-        shell: pwsh
+        shell: powershell
         run: |
           $ErrorActionPreference = "Stop"
           $out = "streamer-tools-camera-$env:GITEA_REF_NAME-windows-x64.zip"