- System images are not required for building. Disabling them makes building faster.

- Make ant flags configurable

pkgs/development/mobile/androidenv/build-app.nix

@@ -1,5 +1,5 @@
 { stdenv, androidsdk, jdk, ant }:
-{ name, src, platformVersions ? [ "8" ], abiVersions ? [ "armeabi-v7a" ], useGoogleAPIs ? false
+{ name, src, platformVersions ? [ "8" ], useGoogleAPIs ? false, antFlags ? ""
 , release ? false, keyStore ? null, keyAlias ? null, keyStorePassword ? null, keyAliasPassword ? null
 }:
 
@@ -11,7 +11,8 @@ let
     else throw "Platform: ${stdenv.system} is not supported!";
 
   androidsdkComposition = androidsdk {
-    inherit platformVersions abiVersions useGoogleAPIs;
+    inherit platformVersions useGoogleAPIs;
+    abiVersions = [];
   };
 in
 stdenv.mkDerivation {
@@ -34,7 +35,7 @@ stdenv.mkDerivation {
     ''}
   
     export ANDROID_SDK_HOME=`pwd` # Key files cannot be stored in the user's home directory. This overrides it.
-    ant ${if release then "release" else "debug"}
+    ant ${antFlags} ${if release then "release" else "debug"}
   '';
   
   installPhase = ''

pkgs/development/mobile/androidenv/default.nix

@@ -57,6 +57,12 @@ rec {
     useGoogleAPIs = true;
   };
   
+  androidsdk_4_2 = androidsdk {
+    platformVersions = [ "17" ];
+    abiVersions = [ "armeabi-v7a" ];
+    useGoogleAPIs = true;
+  };
+  
   buildApp = import ./build-app.nix {
     inherit (pkgs) stdenv jdk ant;
     inherit androidsdk;