diff --git a/lib/gyp/generator/ninja/index.js b/lib/gyp/generator/ninja/index.js
index d02d360..4d63134 100644
--- a/lib/gyp/generator/ninja/index.js
+++ b/lib/gyp/generator/ninja/index.js
@@ -395,7 +395,11 @@ Ninja.prototype.actions = function actions() {
 
   let res = [];
   list.forEach((action) => {
-    const actionRule = action.action_name + '_' + this.index;
+    const safeActionName = action.action_name.replace(/\s/g, '_');
+    global.action_names = (global.action_names || {});
+    const counterRef = global.action_names[safeActionName] || (global.action_names[safeActionName] = {counter: 0});
+    const actionRule = safeActionName + (counterRef.counter || '');
+    counterRef.counter++;
 
     const base = gyp.common.cachedRelative(this.configDir, this.srcDir);
     const toBase = gyp.common.cachedRelative(this.srcDir, this.configDir);
@@ -660,6 +664,7 @@ NinjaMain.prototype.hostVars = function hostVars(target) {
   main.declare('ld_host', ld);
   main.declare('ldxx_host', ldxx);
   main.declare('ar_host', ar);
+
 };
 
 NinjaMain.prototype.rulesAndTargets = function rulesAndTargets() {