Getting Error on Build

Hello,
I have installed all prerequisites and building as given in steps.
But getting below error

Error while executing process /home/optimumanddev2/Android/Sdk/ndk-bundle/ndk-build with arguments {NDK_PROJECT_PATH=null APP_BUILD_SCRIPT=/home/optimumanddev2/Videos/shadowsocks-android-master/core/src/main/jni/Android.mk NDK_APPLICATION_MK=/home/optimumanddev2/Videos/shadowsocks-android-master/core/src/main/jni/Application.mk APP_ABI=x86 NDK_ALL_ABIS=x86 NDK_DEBUG=0 APP_PLATFORM=android-21 NDK_OUT=/home/optimumanddev2/Videos/shadowsocks-android-master/core/build/intermediates/ndkBuild/release/obj NDK_LIBS_OUT=/home/optimumanddev2/Videos/shadowsocks-android-master/core/build/intermediates/ndkBuild/release/lib -j4 APP_SHORT_COMMANDS=false LOCAL_SHORT_COMMANDS=false -B -n}
rm -f /home/optimumanddev2/Videos/shadowsocks-android-master/core/build/intermediates/ndkBuild/release/lib/x86/*
rm -f /home/optimumanddev2/Videos/shadowsocks-android-master/core/build/intermediates/ndkBuild/release/lib/x86/gdbserver
rm -f /home/optimumanddev2/Videos/shadowsocks-android-master/core/build/intermediates/ndkBuild/release/lib/x86/gdb.setup
mkdir -p /home/optimumanddev2/Videos/shadowsocks-android-master/core/build/intermediates/ndkBuild/release/obj/local/x86/objs/jni-helper
echo [x86] "Compile++      ": "jni-helper <= jni-helper.cpp"

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Now We removed path of .mk file from build files, after that error is removed but after that it gives Manifest file merging error.

Please help

Thanks

Please follow the official build instructions.

Yes, we are following official instructions.
Doing same:

  • Set environment variable ANDROID_HOME to /path/to/android-sdk
  • (optional) Set environment variable ANDROID_NDK_HOME to /path/to/android-ndk (default: $ANDROID_HOME/ndk-bundle )
  • Clone the repo using git clone --recurse-submodules <repo> or update submodules using git submodule update --init --recursive
  • Build it using Android Studio or gradle script

could you please suggest any solution?

CI builds without problems so if you encountered errors, you didn’t follow the instructions.