diff --git a/src/vcpkg-utils.ts b/src/vcpkg-utils.ts
index 17b1e510..90fad0fd 100644
--- a/src/vcpkg-utils.ts
+++ b/src/vcpkg-utils.ts
@@ -115,7 +115,12 @@ export class Utils {
     }
 
     key += "-args=" + Utils.hashCode(core.getInput(runvcpkglib.vcpkgArguments));
-    key += "-os=" + Utils.hashCode(process.platform);
+    key += "-os=" + Utils.hashCode(process.env.IMAGE_OS ? process.env.IMAGE_OS : process.platform);
+
+    if (process.env.IMAGE_VERSION) {
+      key += "-imageVer=" + Utils.hashCode(process.env.IMAGE_VERSION);
+    }
+
     key += "-appendedKey=" + Utils.hashCode(appendedCacheKey);
 
     // Add the triplet only if it is provided.