fix: build Android against the devbox-managed JDK and NDK

app/android/build.gradle.kts

@@ -19,6 +19,25 @@ subprojects {
     project.evaluationDependsOn(":app")
 }
 
+// The devbox-managed SDK ships one NDK and is read-only, so Gradle can never
+// install another beside it. Plugin build scripts ask for Flutter's default
+// NDK, which the SDK does not carry; every project is therefore pinned to
+// the one it does. Matches the app's own pin in app/build.gradle.kts.
+gradle.afterProject {
+    // The devbox-managed SDK ships one NDK and is read-only, so Gradle can
+    // never install another beside it. Plugin build scripts ask for
+    // Flutter's default NDK, which the SDK does not carry; every project
+    // is therefore pinned to the one it does, as the app itself is.
+    val android = extensions.findByName("android") ?: return@afterProject
+    try {
+        android::class.java
+            .getMethod("setNdkVersion", String::class.java)
+            .invoke(android, "27.0.12077973")
+    } catch (_: NoSuchMethodException) {
+        // Nothing to pin.
+    }
+}
+
 tasks.register<Delete>("clean") {
     delete(rootProject.layout.buildDirectory)
 }