[Nix-dev] strange nix error

[Ben Franksen]

Hi

I have installed nix under ubuntu, using the ubuntu deb package. Then I 
followed the instructions in the nix manual for multi-user installs, i.e. 
created build users & groups and added a nix.conf:

ben at sarun[1]: ~ > sudo dpkg -i nix_1.6.1-1_amd64.deb
<output elided>
bben at sarun[1]: ~ > cat nix-setup-build-users.sh
#!/bin/sh
addgroup --quiet --gid 40000 nixbld
for i in 1 2 3 4 5 6 7 8 9; do
  adduser --quiet --system --disabled-password --no-create-home --
uid="4000$i" --gecos "Nix build user $i" --ingroup nixbld "nixbld$i"
  adduser --quiet "nixbld$i" nixbld
done
chgrp nixbld /nix/store
chmod 1775 /nix/store
ben at sarun[1]: ~ > sudo sh ./nix-setup-build-users.sh
ben at sarun[1]: ~ > grep nix /etc/{group,passwd}
/etc/group:nixbld:x:40000:nixbld1,nixbld2,nixbld3,nixbld4,nixbld5,nixbld6,nixbld7,nixbld8,nixbld9
/etc/passwd:nixbld1:x:40001:40000:Nix build user 
1,,,:/home/nixbld1:/bin/false
/etc/passwd:nixbld2:x:40002:40000:Nix build user 
2,,,:/home/nixbld2:/bin/false
/etc/passwd:nixbld3:x:40003:40000:Nix build user 
3,,,:/home/nixbld3:/bin/false
/etc/passwd:nixbld4:x:40004:40000:Nix build user 
4,,,:/home/nixbld4:/bin/false
/etc/passwd:nixbld5:x:40005:40000:Nix build user 
5,,,:/home/nixbld5:/bin/false
/etc/passwd:nixbld6:x:40006:40000:Nix build user 
6,,,:/home/nixbld6:/bin/false
/etc/passwd:nixbld7:x:40007:40000:Nix build user 
7,,,:/home/nixbld7:/bin/false
/etc/passwd:nixbld8:x:40008:40000:Nix build user 
8,,,:/home/nixbld8:/bin/false
/etc/passwd:nixbld9:x:40009:40000:Nix build user 
9,,,:/home/nixbld9:/bin/false
ben at sarun[1]: ~ > cat /etc/nix/nix.conf 
build-users-group = nixbld
build-max-jobs = 2
auto-optimise-store = true


Then I do nix-env -i <somepackage> and get

error: setting synchronous mode: unable to open database file

Any idea what went wrong?

Cheers
Ben
-- 
"Make it so they have to reboot after every typo." -- Scott Adams