diff --git a/dist/cleanup/index.js b/dist/cleanup/index.js
index 97d9e158a..851fadf2f 100644
--- a/dist/cleanup/index.js
+++ b/dist/cleanup/index.js
@@ -46744,7 +46744,8 @@ function translateEnvVariables() {
     ];
     for (const envVar of envVars) {
         if (process.env[envVar]) {
-            process.env[`INPUT_${envVar.replace(/_/g, '-')}`] = process.env[envVar];
+            const inputKey = `INPUT_${envVar.replace(/_/g, '-')}`;
+            process.env[inputKey] = process.env[inputKey] || process.env[envVar];
         }
     }
 }
diff --git a/dist/index.js b/dist/index.js
index a0e59786e..9e7a92033 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -306,7 +306,8 @@ function translateEnvVariables() {
     ];
     for (const envVar of envVars) {
         if (process.env[envVar]) {
-            process.env[`INPUT_${envVar.replace(/_/g, '-')}`] = process.env[envVar];
+            const inputKey = `INPUT_${envVar.replace(/_/g, '-')}`;
+            process.env[inputKey] = process.env[inputKey] || process.env[envVar];
         }
     }
 }
diff --git a/src/helpers.ts b/src/helpers.ts
index 050770efb..e15de92b2 100644
--- a/src/helpers.ts
+++ b/src/helpers.ts
@@ -31,7 +31,8 @@ export function translateEnvVariables() {
   ];
   for (const envVar of envVars) {
     if (process.env[envVar]) {
-      process.env[`INPUT_${envVar.replace(/_/g, '-')}`] = process.env[envVar];
+      const inputKey = `INPUT_${envVar.replace(/_/g, '-')}`;
+      process.env[inputKey] = process.env[inputKey] || process.env[envVar];
     }
   }
 }