[Nix-dev] -realise: mounting /proc: Operation not permitted

[Marc Weber]

What might be causing this? 

Nix-daemon nix version is the same which gets activated by the command
below:

 /nix/store/jsfa19hfkrpg39njl7msrnsgfaxjvi3c-nix-1.12pre4997_1351b0d/bin/nix-store --realise /nix/store/kbw4v0hm7srarljkf5idk7ahspd59lp9-system-path.drv/nix/store/kbw4v0hm7srarljkf5idk7ahspd59lp9-system-path.drv

these derivations will be built:
  /nix/store/pq24b3zvyx2fdajsy530vma0n3fgbiv1-NVIDIA-Linux-x86_64-375.26.run.drv
  /nix/store/msddw7c9wnjjmzwg8j9fmcm5gpgp2sgz-nvidia-x11-375.26-4.9.8.drv
  /nix/store/kbw4v0hm7srarljkf5idk7ahspd59lp9-system-path.drv
building path(s) ‘/nix/store/r3219a23idwsvx8dw6zln2mlg34m0jdm-NVIDIA-Linux-x86_64-375.26.run’
error: while setting up the build environment: mounting /proc: Operation not permitted

Marc Weber