diff --git a/.github/actions/cargo-binstall-cbindgen/action.yml b/.github/actions/cargo-binstall-cbindgen/action.yml
index 0eb0f8f5d..303f1a7f4 100644
--- a/.github/actions/cargo-binstall-cbindgen/action.yml
+++ b/.github/actions/cargo-binstall-cbindgen/action.yml
@@ -9,7 +9,7 @@ runs:
     - name: Install cbindgen
       shell: bash
       run: |
-        case "$OS" in
+        case "$RUNNER_OS" in
           Windows)
             cargo install cbindgen --version ${{ inputs.version }};;
           macOS | Linux )
diff --git a/.github/workflows/build_and_deploy.yml b/.github/workflows/build_and_deploy.yml
index 3a7a08355..5913ad583 100644
--- a/.github/workflows/build_and_deploy.yml
+++ b/.github/workflows/build_and_deploy.yml
@@ -231,7 +231,7 @@ jobs:
       - name: Rename the binary
         shell: bash
         run: |
-          case "$OS" in
+          case "$RUNNER_OS" in
             Windows) exe_suffix=.exe;;
             Linux | macOS) exe_suffix=;;
           esac