diff --git a/changeAppSettings.sh b/changeAppSettings.sh
index 328e85016..535d9fb6d 100755
--- a/changeAppSettings.sh
+++ b/changeAppSettings.sh
@@ -896,8 +896,18 @@ else
 	cat $F | sed "s/^package .*;/package $AppFullName;/" >> project/src/Advertisement.java
 fi
 
+if [ -z "$ANDROID_NDK_HOME" ]; then
+	export ANDROID_NDK_HOME="$(which ndk-build | sed 's@/ndk-build@@')"
+fi
+if [ -z "$ANDROID_NDK_HOME" ]; then
+	echo "Set ANDROID_NDK_HOME env variable, or put ndk-build into your PATH"
+	exit 1
+fi
+NDK_VER=$(echo ${ANDROID_NDK_HOME} | grep -Eo '[^/]+$')
+
 cat project/app/build-template.gradle | \
-	sed 's/applicationId .*/applicationId "'"$AppFullName"'"/' > \
+	sed 's/applicationId .*/applicationId "'"${AppFullName}"'"/' | \
+	sed 's/ndkVersion .*/ndkVersion "'"${NDK_VER}"'"/' > \
 	project/app/build.gradle
 
 echo "-keep class $AppFullName.** { *; }" > project/proguard-local.cfg
diff --git a/project/app/build-template.gradle b/project/app/build-template.gradle
index ff24888b2..888f5d514 100644
--- a/project/app/build-template.gradle
+++ b/project/app/build-template.gradle
@@ -8,7 +8,7 @@ android {
 
     defaultConfig {
         applicationId "net.olofson.ballfield"
-        minSdk 16
+        minSdk 19
         targetSdk 31
     }
 
diff --git a/project/gradle.properties b/project/gradle.properties
index 52f5917cb..3c5031eb7 100644
--- a/project/gradle.properties
+++ b/project/gradle.properties
@@ -12,8 +12,12 @@ org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
 # AndroidX package structure to make it clearer which packages are bundled with the
-# Android operating system, and which are packaged with your app"s APK
+# Android operating system, and which are packaged with your app's APK
 # https://developer.android.com/topic/libraries/support-library/androidx-rn
 android.useAndroidX=true
-# Automatically convert third-party libraries to use AndroidX
-android.enableJetifier=true
\ No newline at end of file
+# Kotlin code style for this project: "official" or "obsolete":
+kotlin.code.style=official
+# Enables namespacing of each library's R class so that its R class includes only the
+# resources declared in the library itself and none from the library's dependencies,
+# thereby reducing the size of the R class for that library
+android.nonTransitiveRClass=true
\ No newline at end of file
diff --git a/project/jni/application/openttd/AndroidBuild.sh b/project/jni/application/openttd/AndroidBuild.sh
index e90766c10..123564837 100755
--- a/project/jni/application/openttd/AndroidBuild.sh
+++ b/project/jni/application/openttd/AndroidBuild.sh
@@ -109,7 +109,7 @@ mkdir -p staging-openttd-$VER-$1
 set -e
 
 ${CMAKE_BIN_LOC}cmake --build openttd-$VER-$1 --parallel $BUILD_NUM_CPUS --verbose;
-${CMAKE_BIN_LOC}cmake --install openttd-$VER-$1 --parallel $BUILD_NUM_CPUS --prefix ./staging-openttd-$VER-$1;
+${CMAKE_BIN_LOC}cmake --install openttd-$VER-$1 --prefix ./staging-openttd-$VER-$1;
 cp staging-openttd-$VER-$1/games/libapplication.so libapplication-$1.so;
 mkdir -p ./data
 cp -r staging-openttd-$VER-$1/share/games/application/* data/
diff --git a/project/settings.gradle b/project/settings.gradle
index ea1f3c29c..a548bfdea 100644
--- a/project/settings.gradle
+++ b/project/settings.gradle
@@ -1,3 +1,10 @@
+pluginManagement {
+    repositories {
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
 dependencyResolutionManagement {
     repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
     repositories {