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nix3-build:tldr:1906f
The command nix build ${nixpkgs#pkg}
is a shell command that utilizes the nix
package manager. Here's a breakdown of its components:
-
nix
: It refers to thenix
command-line tool, which is used for package management in the Nix ecosystem. It allows users to build, install, and manage software packages. -
build
: It is a command provided by thenix
tool that instructs Nix to build a specified package or expression. -
${nixpkgs#pkg}
: This is a parameter or argument passed to thenix build
command. It utilizes the (bash) parameter expansion syntax. Let's break it down further:${nixpkgs}
:nixpkgs
is typically an environment variable that holds the path to the Nix package set. The package set contains a collection of packages available for installation or building using Nix.#pkg
: This part utilizes the parameter expansion syntax to remove thepkg
suffix from the value of thenixpkgs
variable. The#
symbol denotes the start of the pattern, andpkg
represents the pattern to be removed.
Therefore, the command nix build ${nixpkgs#pkg}
would build a package specified by the value of the nixpkgs
variable, removing the pkg
suffix from it. The exact purpose and functionality of this command depend on the context and specific use case where it is being used.