diff --git a/.github/workflows/build-unsigned.yaml b/.github/workflows/build-unsigned.yaml
new file mode 100644
index 00000000..5610252e
--- /dev/null
+++ b/.github/workflows/build-unsigned.yaml
@@ -0,0 +1,24 @@
+name: Build Unsigned
+on: [push, pull_request]
+jobs:
+  BuildUnsigned:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v2
+        with:
+          submodules: recursive
+      - name: Setup Java
+        uses: actions/setup-java@v1
+        with:
+          java-version: 11
+      - name: Setup Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.16
+      - name: Setup Android SDK
+        uses: android-actions/setup-android@v2
+      - name: Setup Cmake & Ninja
+        uses: lukka/get-cmake@latest
+      - name: Build
+        run: ./gradlew --no-daemon app:assembleRelease
\ No newline at end of file
diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index d41642e5..9ed11a3e 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -48,13 +48,20 @@ android {
             versionNameSuffix = ".premium"
 
             if (buildFlavor == "premium") {
-                val appCenterKey = rootProject.file("local.properties").inputStream()
-                    .use { Properties().apply { load(it) } }
-                    .getProperty("appcenter.key", null)
+                val localFile = rootProject.file("local.properties")
+                if (localFile.exists()) {
+                    val appCenterKey = localFile.inputStream()
+                        .use { Properties().apply { load(it) } }
+                        .getProperty("appcenter.key", null)
 
-                Objects.requireNonNull(appCenterKey)
-
-                buildConfigField("String", "APP_CENTER_KEY", "\"$appCenterKey\"")
+                    if (appCenterKey != null) {
+                        buildConfigField("String", "APP_CENTER_KEY", "\"$appCenterKey\"")
+                    } else {
+                        buildConfigField("String", "APP_CENTER_KEY", "null")
+                    }
+                } else {
+                    buildConfigField("String", "APP_CENTER_KEY", "null")
+                }
             }
         }
     }
diff --git a/buildSrc/src/main/java/Build.kt b/buildSrc/src/main/java/Build.kt
index 2c0e644c..98a14d4e 100644
--- a/buildSrc/src/main/java/Build.kt
+++ b/buildSrc/src/main/java/Build.kt
@@ -6,7 +6,7 @@ const val buildVersionName = "2.4.2"
 const val buildMinSdkVersion = 21
 const val buildTargetSdkVersion = 30
 
-const val buildNdkVersion = "23.0.7123448"
+const val buildNdkVersion = "22.1.7171670"
 
 val Project.buildFlavor: String
     get() {