generate manifests with different names and packages

AndroidManifest.xml

@@ -2,13 +2,13 @@
 <manifest 
     xmlns:android="http://schemas.android.com/apk/res/android" 
     android:compileSdkVersion="34"
-	package="com.example.shadowing">
+	package="PACKAGE">
     <uses-sdk android:minSdkVersion="28" android:targetSdkVersion="34"/>
 
     <application
         android:supportsRtl="true"
-            android:label="Shadowing">
-        <activity android:name=".MainActivity"
+            android:label="NAME">
+        <activity android:name="com.example.shadowing.MainActivity"
             android:exported="true">
             <intent-filter>
               <action android:name="android.intent.action.MAIN" />

flake.nix

@@ -47,6 +47,16 @@
           mv build/classes.dex $out
         '';
       };
+      make-manifest = package : name: pkgs.stdenvNoCC.mkDerivation {
+        name = "AndroidManifest-${package}.xml";
+        srcs = self;
+        #buildInputs = [ ];
+        phases = ["unpackPhase" "buildPhase"];
+        buildPhase = ''
+          mkdir $out
+          cat AndroidManifest.xml | sed 's/PACKAGE/${package}/' | sed 's/NAME/${name}/' > $out/AndroidManifest.xml
+        '';
+      };
 
       java-classes-main = pkgs.stdenvNoCC.mkDerivation {
         name = "java-class-main";
@@ -82,7 +92,9 @@
     in rec {
 
       packages = {
-        default = pkgs.stdenvNoCC.mkDerivation rec {
+        default = let 
+          manifest = make-manifest "com.example.shadowing.control" "Shadowing C";
+        in pkgs.stdenvNoCC.mkDerivation rec {
           name = "com-example-shadowing.apk";
           srcs = self;
           buildInputs = [ jdk android-env.androidsdk pkgs.which ];
@@ -94,7 +106,8 @@
 
             # link classes.dex not working?
             # ${build-tools}/aapt2 link -v ---manifest AndroidManifest.xml -I ${platforms}/android.jar -o build/app.apk build/apk_files/
-            ${build-tools}/aapt package -v -f -M AndroidManifest.xml -I ${platforms}/android.jar -F build/app.apk build/apk_files/
+
+            ${build-tools}/aapt package -v -f -M ${manifest}/AndroidManifest.xml -I ${platforms}/android.jar -F build/app.apk build/apk_files/
             ${build-tools}/zipalign -f 4 build/app.apk build/app.aligned.apk
 
             keytool -genkeypair -validity 1000 -dname "CN=SomeKey,O=SomeOne,C=FR" -keystore build/ToyKey.keystore -storepass 'P@ssw0rd!' -keypass 'P@ssw0rd!' -alias SignKey -keyalg RSA -v