diff --git a/dist/main/index.js b/dist/main/index.js
index ef60ccd..b97dbcb 100644
--- a/dist/main/index.js
+++ b/dist/main/index.js
@@ -74738,7 +74738,7 @@ function setUpGraalVMDevBuild(gdsToken, javaVersion) {
                 return utils_1.downloadAndExtractJDK(asset.browser_download_url);
             }
         }
-        throw new Error('Could not find GraalVM dev build');
+        throw new Error(`Could not find GraalVM dev build for Java ${javaVersion}. It may no longer be available, so please consider upgrading the Java version. If you think this is a mistake, please file an issue at: https://github.com/graalvm/setup-graalvm/issues.`);
     });
 }
 exports.setUpGraalVMDevBuild = setUpGraalVMDevBuild;
diff --git a/src/graalvm.ts b/src/graalvm.ts
index d1c5446..577e612 100644
--- a/src/graalvm.ts
+++ b/src/graalvm.ts
@@ -52,7 +52,9 @@ export async function setUpGraalVMDevBuild(
       return downloadAndExtractJDK(asset.browser_download_url)
     }
   }
-  throw new Error('Could not find GraalVM dev build')
+  throw new Error(
+    `Could not find GraalVM dev build for Java ${javaVersion}. It may no longer be available, so please consider upgrading the Java version. If you think this is a mistake, please file an issue at: https://github.com/graalvm/setup-graalvm/issues.`
+  )
 }
 
 export async function setUpGraalVMRelease(