diff options
Diffstat (limited to 'doc/manual/nix-env.xml')
| -rw-r--r-- | doc/manual/nix-env.xml | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/doc/manual/nix-env.xml b/doc/manual/nix-env.xml index ff005830e171..8669b9ccf6c4 100644 --- a/doc/manual/nix-env.xml +++ b/doc/manual/nix-env.xml @@ -208,7 +208,16 @@ number of possible ways: installed. Currently installed derivations with a name equal to the name of a derivation being added are removed unless the option <option>--preserve-installed</option> is - specified.</para></listitem> + specified.</para> + + <para>If there are multiple derivations matching a name in + <replaceable>args</replaceable> that have the same name (e.g., + <literal>gcc-3.3.6</literal> and <literal>gcc-4.1.1</literal>), then + only the highest version will be installed. You can force the + installation of multiple derivations with the same name by being + specific about the versions. For instance, <literal>nix-env -i + gcc-3.3.6 gcc-4.1.1</literal> will install both version of GCC (and + will probably cause a user environment conflict!).</para></listitem> <listitem><para>If <link linkend='opt-attr'><option>--attr</option></link> |