[clemens@leto:~]$ nix-shell /nix/store/qc2qinrswr6y2adbq6rv43v8238cvmi6-node-nanopos-0.1.5.drv
[nix-shell:~]$ mkdir /tmp/empty1
[nix-shell:~]$ cd /tmp/empty1
[nix-shell:/tmp/empty1]$ export out=/tmp/nanopos-out/
[nix-shell:/tmp/empty1]$ genericBuild
unpacking sources
patching sources
configuring
no configure script, doing nothing
building
installing
unpacking source archive /nix/store/7n6c91ayl8lkvjvn7xbrwc3xxwqwban6-nanopos-4b80bd5
unpacking source archive /nix/store/90rvamxa1r1wnzpxd575qzmyyzsj9ywc-babel-types-7.0.6.tgz
mv: cannot remove './gvfs': Device or resource busy
unpacking source archive /nix/store/gjm0wygjyjc7bnxqy7sbl4fmapa6yjwg-babylon-6.16.5.tgz
mv: cannot remove './gvfs': Device or resource busy
unpacking source archive /nix/store/96q2f068q9d6n6wm7f030bpngmgw7kz3-accepts-1.3.5.tgz
mv: cannot remove './gvfs': Device or resource busy
unpacking source archive /nix/store/g210m5scvl78jq8d04rqvqgh4nwp0v3q-accounting-0.4.1.tgz
mv: cannot remove './gvfs': Device or resource busy
unpacking source archive /nix/store/3bqq72cmcgwp1dm3819mvgbbn83wdgwr-acorn-3.3.0.tgz
mv: cannot remove './gvfs': Device or resource busy
unpacking source archive /nix/store/gvn7ncbl9l38mw1j46b8v0yxxv5pcvsp-acorn-globals-3.1.0.tgz
mv: cannot remove './gvfs': Device or resource busy