diff --git a/schema/firebase-config.json b/schema/firebase-config.json
index b2bbeca6691..2a1ef0a06d7 100644
--- a/schema/firebase-config.json
+++ b/schema/firebase-config.json
@@ -1107,6 +1107,9 @@
                             },
                             "type": "array"
                         },
+                        "localBuild": {
+                            "type": "boolean"
+                        },
                         "rootDir": {
                             "type": "string"
                         }
@@ -1134,6 +1137,9 @@
                                 },
                                 "type": "array"
                             },
+                            "localBuild": {
+                                "type": "boolean"
+                            },
                             "rootDir": {
                                 "type": "string"
                             }
diff --git a/src/deploy/apphosting/release.ts b/src/deploy/apphosting/release.ts
index 4a5e3f62dbf..d64f44f1c04 100644
--- a/src/deploy/apphosting/release.ts
+++ b/src/deploy/apphosting/release.ts
@@ -44,6 +44,7 @@ export default async function (context: Context, options: Options): Promise<void
             archive: {
               userStorageUri: storageUri,
               rootDirectory: config.rootDir,
+              locallyBuiltSource: config.localBuild,
             },
           },
         },
diff --git a/src/firebaseConfig.ts b/src/firebaseConfig.ts
index e2161f3872a..fc94a368351 100644
--- a/src/firebaseConfig.ts
+++ b/src/firebaseConfig.ts
@@ -308,6 +308,7 @@ export type AppHostingSingle = {
   rootDir: string;
   ignore: string[];
   alwaysDeployFromSource?: boolean;
+  localBuild?: boolean;
 };
 
 export type AppHostingMultiple = AppHostingSingle[];
diff --git a/src/gcp/apphosting.ts b/src/gcp/apphosting.ts
index 1654ad3741b..8c74402cddb 100644
--- a/src/gcp/apphosting.ts
+++ b/src/gcp/apphosting.ts
@@ -102,6 +102,8 @@ assertImplements<BuildOutputOnlyFields, RecursiveKeyOf<Build>>();
 export interface BuildConfig {
   minInstances?: number;
   memory?: string;
+  env?: string[];
+  runCommand?: string;
 }
 
 interface BuildSource {
@@ -129,6 +131,7 @@ interface ArchiveSource {
   // end oneof reference
   rootDirectory?: string;
   author?: SourceUserMetadata;
+  locallyBuiltSource?: boolean;
 }
 
 interface SourceUserMetadata {