Try Android SDK version 26

Author: hamishmack

overlays/android.nix

@@ -1,14 +1,21 @@
 _final: prev: {
+  # Use android SDK version 26
   pkgsCross = prev.pkgsCross // {
     aarch64-android = import prev.path {
       inherit system;
       inherit (prev) overlays;
-      crossSystem = prev.lib.systems.examples.aarch64-android // { sdkVer = "26"; };
+      crossSystem = prev.lib.systems.examples.aarch64-android // {
+        sdkVer = "26"; # Old name for old nixpkgs
+        androidSdkVersion = "26";
+      };
     };
     armv7a-android-prebuilt = import prev.path {
       inherit system;
       inherit (prev) overlays;
-      crossSystem = prev.lib.systems.examples.armv7a-android-prebuilt // { sdkVer = "26"; };
+      crossSystem = prev.lib.systems.examples.armv7a-android-prebuilt // {
+        sdkVer = "26"; # Old name for old nixpkgs
+        androidSdkVersion = "26";
+      };
     };
   };
 } // prev.lib.optionalAttrs prev.stdenv.hostPlatform.isAndroid ({