lib.systems: throw if `sdkVer` or `ndkVer` are used for android.

Those attrs have been renamed and throwing is the best way to show it,
if we only warned then the user would only get an error like this `error: Unsupported sdk: 33`
from `pkgs/top-level/darwin-packages.nix`.

If someone wants to support multiple NixOS versions then they can simply
set both attrs. (`!args ? androidSdkVersion` is for that)

2 files changed, 18 insertions, 0 deletions

diff --git a/lib/systems/default.nix b/lib/systems/default.nix
index 0b8aeda208e3..65b85c8443e8 100644
--- a/lib/systems/default.nix
+++ b/lib/systems/default.nix
@@ -257,6 +257,22 @@ let
         if final.isMacOS then "MACOSX_DEPLOYMENT_TARGET"
         else if final.isiOS then "IPHONEOS_DEPLOYMENT_TARGET"
         else null;
+
+      # Remove before 25.05
+      androidSdkVersion =
+        if (args ? sdkVer && !args ? androidSdkVersion) then
+          throw "For android `sdkVer` has been renamed to `androidSdkVersion`"
+        else if (args ? androidSdkVersion) then
+          args.androidSdkVersion
+        else
+          null;
+      androidNdkVersion =
+        if (args ? ndkVer && !args ? androidNdkVersion) then
+          throw "For android `ndkVer` has been renamed to `androidNdkVersion`"
+        else if (args ? androidSdkVersion) then
+          args.androidNdkVersion
+        else
+          null;
     } // (
       let
         selectEmulator = pkgs:
diff --git a/lib/systems/examples.nix b/lib/systems/examples.nix
index d582ecba2bed..971f6b87364b 100644
--- a/lib/systems/examples.nix
+++ b/lib/systems/examples.nix
@@ -60,6 +60,8 @@ rec {
   armv7a-android-prebuilt = {
     config = "armv7a-unknown-linux-androideabi";
     rust.rustcTarget = "armv7-linux-androideabi";
+    androidSdkVersion = "33";
+    androidNdkVersion = "26";
     useAndroidPrebuilt = true;
   } // platforms.armv7a-android;