diff --git a/ci/build-android.sh b/ci/build-android.sh
index 4191dcf7..514780b8 100755
--- a/ci/build-android.sh
+++ b/ci/build-android.sh
@@ -2,19 +2,14 @@
 
 set -euxo pipefail
 
-if [[ "$OS_NAME" == "osx" ]]; then
-	ANDROID_HOME=$HOME/Library/Android/sdk
-	SDKMANAGER=$ANDROID_HOME/cmdline-tools/latest/bin/sdkmanager
-	echo y | $SDKMANAGER "ndk;21.4.7075529"
-	ln -sfn $ANDROID_HOME/ndk/21.4.7075529 $ANDROID_HOME/ndk-bundle
-	$ANDROID_HOME/ndk-bundle/ndk-build -j3
-fi
-if [[ "$OS_NAME" == "linux" ]]; then
-	ANDROID_ROOT=/usr/local/lib/android
-	ANDROID_SDK_ROOT=${ANDROID_ROOT}/sdk
-	SDKMANAGER=${ANDROID_SDK_ROOT}/cmdline-tools/latest/bin/sdkmanager
-	echo "y" | $SDKMANAGER "ndk;21.4.7075529"
-	ANDROID_NDK_ROOT=${ANDROID_SDK_ROOT}/ndk-bundle
-	ln -sfn $ANDROID_SDK_ROOT/ndk/21.4.7075529 $ANDROID_NDK_ROOT
-	$ANDROID_HOME/ndk-bundle/ndk-build -j2
+PROCS=""
+if [[ "$TRAVIS_OS_NAME" == "macosx" ]]; then
+    PROCS=$(sysctl -n hw.ncpu)
+else
+    PROCS=$(nproc)
 fi
+
+SDKMANAGER=$ANDROID_HOME/cmdline-tools/latest/bin/sdkmanager
+echo y | $SDKMANAGER "ndk;21.4.7075529"
+ln -sfn $ANDROID_HOME/ndk/21.4.7075529 $ANDROID_HOME/ndk-bundle
+$ANDROID_HOME/ndk-bundle/ndk-build -j$PROCS