tar: /gnu/store/f30pgrhdmyv0nkicm3lgkh92sxxm6hvb-opencv_contrib-3.4.3-checkout: Cannot read: Is a directory
tar: At beginning of tape, quitting now
tar: Error is not recoverable: exiting now
error: in phase 'unpack-submodule-sources': uncaught exception:
%exception #<&invoke-error program: "tar" arguments: ("xvf" "/gnu/store/f30pgrhdmyv0nkicm3lgkh92sxxm6hvb-opencv_contrib-3.4.3-checkout" "--strip-components=1" "-C" "../opencv-contrib") exit-status: 2 term-signal: #f stop-signal: #f> 
phase `unpack-submodule-sources' failed after 6.5 seconds