diff --git a/drone_gen.js b/drone_gen.js
index f1d3baf..f5303a1 100644
--- a/drone_gen.js
+++ b/drone_gen.js
@@ -5,14 +5,18 @@ const yaml = require('js-yaml');
 const ini = require('ini');
 
 const gitmodules = ini.parse(fs.readFileSync('.gitmodules', 'utf-8'));
-const submodules = Object.values(gitmodules).map(m => m.path);
+const gitmodulepaths = Object.values(gitmodules).map(m => m.path);
 /*
 const folders = fs.readdirSync(cwd, { withFileTypes: true });
 const dockers = folders.filter(f => 
 	f.isDirectory() && fs.readdirSync(path.join(cwd, f.name)).includes('Dockerfile')
 ).map(f => f.name);
 */
-const dockers = submodules; // Assumption: All submodules have Docker. Should hold true
+const submodules = gitmodulepaths.concat([
+	// Additional nested submodules
+	'backend-protobuf',
+]);
+const dockers = gitmodulepaths; // Assumption: All submodules have Docker. Should hold true
 
 const submodule_override = submodules.reduce((acc, f) => {
 	acc[f] = 'https://git.makerforce.io/beep/' + f + '.git';