I'm trying to install CyanogenMod on Nexus 4 and so far I had done this:

• installed google driver;
  

• enabled developer options on my phone;
  

• enabled debugging by USB;
  

• unlocked my device using ADB;
  

• installed CyanogenMod Recovery;

  PS C:\Program Files (x86)\Android\android-sdk\platform-tools> .\fastboot flash recovery .\cm-13.0-20160510-NIGHTLY-mako- recovery.img

• started bootloader;

Then I get the following error trying to push the file to the devuce:

PS C:\Program Files (x86)\Android\android-sdk\platform-tools> .\fastboot devices
01cf8682d9c98ac0        fastboot
PS C:\Program Files (x86)\Android\android-sdk\platform-tools> .\adb push cm-13.0-20160510-NIGHTLY-mako.zip /sdcard
error: device '(null)' not found

I followed CyanogenMod instructions step-by-step, including troubleshooting section, but I keep getting this error.