The expressions are combined into a single attribute set, each expression under an attribute with the same name as the original file or subdirectory. If the default expression is a directory without a default.nix file, then its contents (both files and subdirectories) are loaded as Nix expressions.If the default expression is a directory containing a default.nix file, that default.nix file is loaded as a Nix expression.If the default expression is a file, it is loaded as a Nix expression.$XDG_STATE_HOME/nix/defexpr if use-xdg-base-directories is set to true.

The source for the default Nix expressions used by nix-env: Matches any package name containing the strings firefox or '*zip*' does not work, because in a regular expression, theĬharacter * is interpreted as a quantifier. Matches any package name containing the string zip. Quantifier, and the backslash must be escaped in turn with anotherīackslash to ensure that the shell passes it on. Using a backslash to prevent it from being interpreted as a Matches the package name firefox and version 32.0. Matches the package name firefox and any version. The regular expression can optionally be followed by aĭash and a version number if omitted, any version of the package will (For details on regular expressions, see regex(7).) The match isĬase-sensitive. These areĮxtended regular expressions that must match the entire name of the Several commands, such as nix-env -query and nix-env -install, take a list ofĪrguments that specify the packages on which to operate. Nix-env takes exactly one operation flag which indicates the Individual users can switch between different environments. There may be many userĮnvironments: different users can have different environments, and In other words, they are a synthesised view of the UserĮnvironments are sets of software packages available to a user at some The command nix-env is used to manipulate Nix user environments. Nix-env - manipulate or query Nix user environments Synopsis

For windows instal Q-Dir 11.29