I was trying to install apk with adb install but when I tried to install it I got the following error,
Failure [INSTALL_FAILED_INVALID_APK: Package couldn't be installed in /data/app/conform.src.com.conform-1: Package /data/app/conform.src.com.conform-1/base.apk code is missing]
I had the same trouble when installing AOSP built apks.
I did
mm DEX_PREOPT_DEFAULT=nostripping
and it worked.