[Q] Can't push CM-12.1 to NP for installation

Hey guys!

I'm tearing out my hair over this. My NP has bootloader unlocked and is rooted.
I've been sitting a few hours just to install CM-12.1 on my NP... but it won't work!

I can see that my NP is connected when I type:

Code:

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adb devices

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I push using this command:

Code:

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adb push cm-12.1-20150830-NIGHTLY-fugu.zip /sdcard/cm-12.1-20150830-NIGHTLY-fugu.zip

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I also tried:

Code:

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adb push cm-12.1-20150830-NIGHTLY-fugu.zip /sdcard/

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It succeeds in pushing the file, because I can see it when I type:

Code:

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adb shell ls /sdcard/

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But when I choose install from internal storage in Cyanogen Recovery, the file does not show up! I've tried it over and over again for hours.

Am I doing something wrong?