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FAQ/Pinning Nixpkgs: Difference between revisions
Missing `ref` attribute from `fetchGit` invocation
imported>Hyperfekt (→Nix 2.0 onwards: hide outdated info about fetchGit being faster) |
imported>Onetom (Missing `ref` attribute from `fetchGit` invocation) |
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| Line 28: | Line 28: | ||
# Commit hash for nixos-unstable as of 2018-09-12 | # Commit hash for nixos-unstable as of 2018-09-12 | ||
# `git ls-remote https://github.com/nixos/nixpkgs-channels nixos-unstable` | # `git ls-remote https://github.com/nixos/nixpkgs-channels nixos-unstable` | ||
ref = "refs/heads/nixpkgs-unstable"; | |||
rev = "ca2ba44cab47767c8127d1c8633e2b581644eb8f"; | rev = "ca2ba44cab47767c8127d1c8633e2b581644eb8f"; | ||
}) {} | }) {} | ||
</syntaxhighlight> | |||
If the <code>ref</code> attribute is omitted, we get an error like this: | |||
<syntaxhighlight> | |||
fatal: not a tree object: 3d70d4ba0b6be256974910e635fadcc0e9579b2a | |||
error: while evaluating the attribute 'buildInputs' of the derivation 'nix-shell' at /nix/store/b93cq865x6qxpn4dw9ivrk3yjcsm8r97-nixos-19.09/pkgs/build-support/mkshell/default.nix:28:3: | |||
while evaluating 'getOutput' at /nix/store/b93cq865x6qxpn4dw9ivrk3yjcsm8r97-nixos-19.09/lib/attrsets.nix:464:23, called from undefined position: | |||
while evaluating anonymous function at /nix/store/b93cq865x6qxpn4dw9ivrk3yjcsm8r97-nixos-19.09/pkgs/stdenv/generic/make-derivation.nix:142:17, called from undefined position: | |||
program 'git' failed with exit code 128 | |||
</syntaxhighlight> | </syntaxhighlight> | ||