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| -rw-r--r-- | doc/manual/expressions/builtins.xml | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/doc/manual/expressions/builtins.xml b/doc/manual/expressions/builtins.xml index 5489fab0026a..54f697d852e3 100644 --- a/doc/manual/expressions/builtins.xml +++ b/doc/manual/expressions/builtins.xml @@ -310,8 +310,17 @@ with import (fetchTarball https://github.com/NixOS/nixpkgs-channels/archive/nixo stdenv.mkDerivation { … } </programlisting> + </para> + + <para>The fetched tarball is cached for a certain amount of time + (1 hour by default) in <filename>~/.cache/nix/tarballs/</filename>. + You can change the cache timeout either on the command line with + <option>--option tarball-ttl <replaceable>number of seconds</replaceable></option> or + in the Nix configuration file with this option: + <literal>tarball-ttl <replaceable>number of seconds to cache</replaceable></literal>. + </para> - Note that when obtaining the hash with <varname>nix-prefetch-url + <para>Note that when obtaining the hash with <varname>nix-prefetch-url </varname> the option <varname>--unpack</varname> is required. </para> |