diff --git a/haxetool/android.js b/haxetool/android.js
index b713529..11d0671 100755
--- a/haxetool/android.js
+++ b/haxetool/android.js
@@ -61,12 +61,33 @@ class Android extends Sdk {
 
     sdkmanager(packages) {
         this.log.i('sdkmanager: *%s*', packages.join(', '));
+        const installedFile = path.join(this.path, '.installed');
+        const installed = new Set(
+            fs.existsSync(installedFile) ?
+                fs.readFileSync(installedFile, {encoding: 'utf8'}).split('\n') :
+                []
+        );
+        const install = new Set(packages);
+        for (const key of installed) {
+            if (install.has(key)) {
+                install.delete(key);
+            }
+        }
+        if (install.size === 0) {
+            return Promise.resolve();
+        }
         const androidBin = path.join(this.path, 'tools/bin/sdkmanager');
         if (fs.existsSync(androidBin)) {
             fs.chmodSync(androidBin, 0o755);
         }
         const yes = '(while sleep 3; do echo "y"; done)';
-        return exec('.', [yes, '|', androidBin].concat(packages.map(name => `"${name}"`)).join(' '));
+        const command = [yes, '|', androidBin].concat(Array.from(install).map(name => `"${name}"`)).join(' ');
+        return exec('.', command).then(() => {
+            for (const key of install) {
+                installed.add(key);
+            }
+            fs.writeFileSync(installedFile, Array.from(installed).join('\n'), {encoding: 'utf8'});
+        });
     }
 
     activate() {
diff --git a/haxetool/haxe.js b/haxetool/haxe.js
index 61ae536..998cc95 100755
--- a/haxetool/haxe.js
+++ b/haxetool/haxe.js
@@ -82,9 +82,7 @@ class Haxe extends Sdk {
     }
 
     resolveBuildDir(config) {
-        //const baseDir = os.tmpdir();
-        const baseDir = process.cwd();
-        return path.join(baseDir, 'build', config.name);
+        return path.join(Haxe.buildDir, config.name);
     }
 
     openfl(command, platform, config, debug=false) {
@@ -204,6 +202,8 @@ class Haxe extends Sdk {
     }
 }
 
+Haxe.buildDir = path.join(process.cwd(), 'build');
+
 Haxe.ID = 'haxe';
 
 Haxe.VERSION_3_4_0 = '3.4.0';
diff --git a/package.json b/package.json
index 944c05b..e3f8c4a 100755
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "gulp-haxetool",
-  "version": "0.1.2",
+  "version": "0.1.3",
   "description": "HaXe Tool for Gulp",
   "main": "index.js",
   "dependencies": {