diff --git a/modules/lamassu-lnbits.nix b/modules/lamassu-lnbits.nix
index 6a7df16..d7191ee 100644
--- a/modules/lamassu-lnbits.nix
+++ b/modules/lamassu-lnbits.nix
@@ -322,6 +322,11 @@ in
         # CRITICAL: pnpm fails without TTY unless CI=true is set
         # See: https://github.com/pnpm/pnpm/issues/6434
         CI = "true";
+        # Set CC/CXX for node-gyp
+        CC = "${pkgs.stdenv.cc}/bin/cc";
+        CXX = "${pkgs.stdenv.cc}/bin/c++";
+        # Limit concurrent scripts to avoid race conditions
+        npm_config_jobs = "1";
       };
 
       serviceConfig = {
@@ -396,7 +401,8 @@ in
         fi
 
         echo "==> Installing dependencies with pnpm..."
-        pnpm install --no-frozen-lockfile
+        # Use --child-concurrency=1 to run install scripts sequentially (avoids race conditions)
+        pnpm install --no-frozen-lockfile --child-concurrency=1
 
         echo "==> Building project..."
         pnpm build