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authorEelco Dolstra <eelco.dolstra@logicblox.com>2016-06-02T13·08+0200
committerEelco Dolstra <eelco.dolstra@logicblox.com>2016-06-02T14·02+0200
commit4494000e04122f24558e1436e66d20d89028b4bd (patch)
tree4d8bb49449aa6f8611a05c96bc9d7342430232f2 /doc/manual/installation/obtaining-source.xml
parent064816ab98e7a230b6e9f4071353f5172e70cf03 (diff)
LocalStore: Allow the physical and logical store directories to differ
This is primarily to subsume the functionality of the
copy-from-other-stores substituter. For example, in the NixOS
installer, we can now do (assuming we're in the target chroot, and the
Nix store of the installation CD is bind-mounted on /tmp/nix):

  $ nix-build ... --option substituters 'local?state=/tmp/nix/var&real=/tmp/nix/store'

However, unlike copy-from-other-stores, this also allows write access
to such a store. One application might be fetching substitutes for
/nix/store in a situation where the user doesn't have sufficient
privileges to create /nix, e.g.:

  $ NIX_REMOTE="local?state=/home/alice/nix/var&real=/home/alice/nix/store" nix-build ...
Diffstat (limited to 'doc/manual/installation/obtaining-source.xml')
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