grgsm_scanner not working on raspberry pi zero w

Hi, 
I try to run "grgsm_scanner -b GSM900" on a raspi zero w and this is the output :

Try scan CCCH on 975-1023 arfcn`s:
Scanning: 0.00% done..

I use as a SDR a NESDR v5 and the raspi os is based on debian bookworn. 
I tried on a dragon os virtual machine with the same SDR and this works fine.

Thanks for the help !