diff --git a/action.yaml b/action.yaml
index 63eb63b..0ab1958 100644
--- a/action.yaml
+++ b/action.yaml
@@ -40,8 +40,22 @@ runs:
         shaprog() {
           case ${{ runner.os }} in
             Linux)
-              sha256sum --ignore-missing --check $2
+              case ${{ runner.arch }} in
+               X64)
+                sha256sum -c gptscript-v${{ inputs.gptscript-release }}-linux-amd64.tar.gz
+                ;;
+
+               ARM64)
+                sha256sum -c gptscript-v${{ inputs.gptscript-release }}-linux-arm64.tar.gz
+                ;;
+
+               *)
+                log_error "unsupported architecture $arch"
+                exit 1
+                ;;
+              esac
               ;;
+
             macOS)
               shasum -a256 --ignore-missing --check $2
               ;;