Environment variables - Revision history

Jonboh: Added a way to fix "pam_env(sudo:session): Expandable variables must be wrapped in {}"

2026-01-25T15:27:40Z

Added a way to fix "pam_env(sudo:session): Expandable variables must be wrapped in {}"

@@ Line 55: / Line 55: @@
 ==== Solution or workaround ====
-Unknown.
+Using Nix string literals can fix the problem by keeping the curly brackets after the nix evaluation.
 == Using variables from a Nix expression ==

Pigs: Add categories nixos and configuration

2025-05-17T16:34:48Z

Add categories nixos and configuration

← Older revision		Revision as of 16:34, 17 May 2025
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	NIX_STORE=/nix/store		NIX_STORE=/nix/store
	</pre>		</pre>

			[[Category:NixOS]]
			[[Category:Configuration]]

Axka: Add info about session variables and environment variables

2024-11-19T12:42:57Z

Add info about session variables and environment variables

← Older revision		Revision as of 12:42, 19 November 2024
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	Environment variables can be set with [https://search.nixos.org/options?channel=unstable&show=environment.variables&from=0&size=50&sort=relevance&type=packages&query=environment.variables environment.variables ], [https://search.nixos.org/options?channel=unstable&show=environment.sessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.sessionVariables environment.sessionVariables ], and [https://search.nixos.org/options?channel=unstable&show=environment.profileRelativeSessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.profileRelativeSessionVariables environment.profileRelativeSessionVariables ] .		Environment variables can be set with [https://search.nixos.org/options?channel=unstable&show=environment.variables&from=0&size=50&sort=relevance&type=packages&query=environment.variables environment.variables ], [https://search.nixos.org/options?channel=unstable&show=environment.sessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.sessionVariables environment.sessionVariables ], and [https://search.nixos.org/options?channel=unstable&show=environment.profileRelativeSessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.profileRelativeSessionVariables environment.profileRelativeSessionVariables ] .
	<code>environment.variables</code> are global variables set on shell initialization, whereas <code>environment.sessionVariables</code> and <code>environment.profileRelativeSessionVariables</code> are initialized through PAM (Pluggable Authentication Module).		<code>environment.variables</code> are global variables set on shell initialization, whereas <code>environment.sessionVariables</code> and <code>environment.profileRelativeSessionVariables</code> are initialized through PAM (Pluggable Authentication Module).

			Session variable sets are merged into their environment variable set counterparts. For example, <code>environment.sessionVariables</code> is merged to <code>environment.variables</code> so you can just reload your shell to reload changed variables [https://github.com/NixOS/nixpkgs/blob/5e4fbfb6b3de1aa2872b76d49fafc942626e2add/nixos/modules/config/shells-environment.nix#L166-L170].

	For example, for the [https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html#variables XDG Base Directory Specification], the following could be set to <code>/etc/nixos/configuration.nix</code>:		For example, for the [https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html#variables XDG Base Directory Specification], the following could be set to <code>/etc/nixos/configuration.nix</code>:

Mic92: fix outdated link

2024-07-05T05:45:47Z

fix outdated link

← Older revision		Revision as of 05:45, 5 July 2024
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	== Configuration of shell environment on NixOS ==		== Configuration of shell environment on NixOS ==

	Environment variables can be set with [https://search.nixos.org/options?channel=unstable&show=environment.variables&from=0&size=50&sort=relevance&type=packages&query=environment.variables environment.variables ], [https://search.nixos.org/options?channel=~~23.11~~&show=environment.sessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.sessionVariables environment.sessionVariables ], and [https://search.nixos.org/options?channel=unstable&show=environment.profileRelativeSessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.profileRelativeSessionVariables environment.profileRelativeSessionVariables ] .		Environment variables can be set with [https://search.nixos.org/options?channel=unstable&show=environment.variables&from=0&size=50&sort=relevance&type=packages&query=environment.variables environment.variables ], [https://search.nixos.org/options?channel=unstable&show=environment.sessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.sessionVariables environment.sessionVariables ], and [https://search.nixos.org/options?channel=unstable&show=environment.profileRelativeSessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.profileRelativeSessionVariables environment.profileRelativeSessionVariables ] .
	<code>environment.variables</code> are global variables set on shell initialization, whereas <code>environment.sessionVariables</code> and <code>environment.profileRelativeSessionVariables</code> are initialized through PAM (Pluggable Authentication Module).		<code>environment.variables</code> are global variables set on shell initialization, whereas <code>environment.sessionVariables</code> and <code>environment.profileRelativeSessionVariables</code> are initialized through PAM (Pluggable Authentication Module).

YoshiRulz: Add section re: builtins.getEnv

2024-05-27T03:03:09Z

Add section re: builtins.getEnv

← Older revision		Revision as of 03:03, 27 May 2024
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	==== Solution or workaround ====		==== Solution or workaround ====
	Unknown.		Unknown.

			== Using variables from a Nix expression ==

			The <code>builtins.getEnv</code> function allows for reading the environment of the Nix command which triggered the expression to be evaluated, typically <code>nix-build</code>.

	== Variables exposed in nix-build sandbox ==		== Variables exposed in nix-build sandbox ==

YoshiRulz: Add clarification to section headers

2024-05-27T02:26:23Z

Add clarification to section headers

← Older revision		Revision as of 02:26, 27 May 2024
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	== Configuration ==		== Configuration of shell environment on NixOS ==

	Environment variables can be set with [https://search.nixos.org/options?channel=unstable&show=environment.variables&from=0&size=50&sort=relevance&type=packages&query=environment.variables environment.variables ], [https://search.nixos.org/options?channel=23.11&show=environment.sessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.sessionVariables environment.sessionVariables ], and [https://search.nixos.org/options?channel=unstable&show=environment.profileRelativeSessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.profileRelativeSessionVariables environment.profileRelativeSessionVariables ] .		Environment variables can be set with [https://search.nixos.org/options?channel=unstable&show=environment.variables&from=0&size=50&sort=relevance&type=packages&query=environment.variables environment.variables ], [https://search.nixos.org/options?channel=23.11&show=environment.sessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.sessionVariables environment.sessionVariables ], and [https://search.nixos.org/options?channel=unstable&show=environment.profileRelativeSessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.profileRelativeSessionVariables environment.profileRelativeSessionVariables ] .
Line 55:		Line 55:
	Unknown.		Unknown.

	== nix-build sandbox ==		== Variables exposed in nix-build sandbox ==

	Compared to a normal shell environment, in a nix-build sandbox,		Compared to a normal shell environment, in a nix-build sandbox,

Gdennie: acronyms should have in page definition

2024-04-06T16:00:11Z

acronyms should have in page definition

← Older revision		Revision as of 16:00, 6 April 2024
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	Environment variables can be set with [https://search.nixos.org/options?channel=unstable&show=environment.variables&from=0&size=50&sort=relevance&type=packages&query=environment.variables environment.variables ], [https://search.nixos.org/options?channel=23.11&show=environment.sessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.sessionVariables environment.sessionVariables ], and [https://search.nixos.org/options?channel=unstable&show=environment.profileRelativeSessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.profileRelativeSessionVariables environment.profileRelativeSessionVariables ] .		Environment variables can be set with [https://search.nixos.org/options?channel=unstable&show=environment.variables&from=0&size=50&sort=relevance&type=packages&query=environment.variables environment.variables ], [https://search.nixos.org/options?channel=23.11&show=environment.sessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.sessionVariables environment.sessionVariables ], and [https://search.nixos.org/options?channel=unstable&show=environment.profileRelativeSessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.profileRelativeSessionVariables environment.profileRelativeSessionVariables ] .
	<code>environment.variables</code> are global variables set on shell initialization, whereas <code>environment.sessionVariables</code> and <code>environment.profileRelativeSessionVariables</code> are initialized through PAM.		<code>environment.variables</code> are global variables set on shell initialization, whereas <code>environment.sessionVariables</code> and <code>environment.profileRelativeSessionVariables</code> are initialized through PAM (Pluggable Authentication Module).

	For example, for the [https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html#variables XDG Base Directory Specification], the following could be set to <code>/etc/nixos/configuration.nix</code>:		For example, for the [https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html#variables XDG Base Directory Specification], the following could be set to <code>/etc/nixos/configuration.nix</code>:

imported>Symys: Tweaked formatting.

2023-12-24T08:49:34Z

Tweaked formatting.

← Older revision		Revision as of 08:49, 24 December 2023
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	== Configuration ==		== Configuration ==

	Environment variables can be set with [https://search.nixos.org/options?channel=unstable&show=environment.variables&from=0&size=50&sort=relevance&type=packages&query=environment.variables ~~<code>~~environment.variables~~</code>~~ ], [https://search.nixos.org/options?channel=23.11&show=environment.sessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.sessionVariables ~~<code>~~environment.sessionVariables~~</code>~~ ], and [https://search.nixos.org/options?channel=unstable&show=environment.profileRelativeSessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.profileRelativeSessionVariables <code>environment.~~profileRelativeSessionVariables~~</code> ~~] . environment.variables~~ are global variables set on shell initialization, whereas environment.sessionVariables and environment.profileRelativeSessionVariables are initialized through PAM. For example, for the [https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html#variables XDG Base Directory Specification], the following could be set to <code>/etc/nixos/configuration.nix</code>:		Environment variables can be set with [https://search.nixos.org/options?channel=unstable&show=environment.variables&from=0&size=50&sort=relevance&type=packages&query=environment.variables environment.variables ], [https://search.nixos.org/options?channel=23.11&show=environment.sessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.sessionVariables environment.sessionVariables ], and [https://search.nixos.org/options?channel=unstable&show=environment.profileRelativeSessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.profileRelativeSessionVariables environment.profileRelativeSessionVariables ] .
			<code>environment.variables</code> are global variables set on shell initialization, whereas <code>environment.sessionVariables</code> and <code>environment.profileRelativeSessionVariables</code> are initialized through PAM.

			For example, for the [https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html#variables XDG Base Directory Specification], the following could be set to <code>/etc/nixos/configuration.nix</code>:

	<syntaxhighlight lang="nix">		<syntaxhighlight lang="nix">

imported>Symys: Fixed hyperlink formatting.

2023-12-24T08:45:27Z

Fixed hyperlink formatting.

← Older revision		Revision as of 08:45, 24 December 2023
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	== Configuration ==		== Configuration ==

	Environment variables can be set with [https://search.nixos.org/options?channel=unstable&show=environment.variables&from=0&size=50&sort=relevance&type=packages&query=environment.variables <code>environment.variables</code> ], [ https://search.nixos.org/options?channel=23.11&show=environment.sessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.sessionVariables <code>environment.sessionVariables</code> ], and [ https://search.nixos.org/options?channel=unstable&show=environment.profileRelativeSessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.profileRelativeSessionVariables <code>environment.profileRelativeSessionVariables</code>] . environment.variables are global variables set on shell initialization, whereas environment.sessionVariables and environment.profileRelativeSessionVariables are initialized through PAM. For example, for the [https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html#variables XDG Base Directory Specification], the following could be set to <code>/etc/nixos/configuration.nix</code>:		Environment variables can be set with [https://search.nixos.org/options?channel=unstable&show=environment.variables&from=0&size=50&sort=relevance&type=packages&query=environment.variables <code>environment.variables</code> ], [https://search.nixos.org/options?channel=23.11&show=environment.sessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.sessionVariables <code>environment.sessionVariables</code> ], and [https://search.nixos.org/options?channel=unstable&show=environment.profileRelativeSessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.profileRelativeSessionVariables <code>environment.profileRelativeSessionVariables</code> ] . environment.variables are global variables set on shell initialization, whereas environment.sessionVariables and environment.profileRelativeSessionVariables are initialized through PAM. For example, for the [https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html#variables XDG Base Directory Specification], the following could be set to <code>/etc/nixos/configuration.nix</code>:

	<syntaxhighlight lang="nix">		<syntaxhighlight lang="nix">

imported>Symys: Added clarification on the use of environment.variables vs other options.

2023-12-24T08:43:45Z

Added clarification on the use of environment.variables vs other options.

← Older revision		Revision as of 08:43, 24 December 2023
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	== Configuration ==		== Configuration ==

	Environment variables can be set with [https://search.nixos.org/options?channel=unstable&show=environment.variables&from=0&size=50&sort=relevance&type=packages&query=environment.variables <code>environment.variables</code> ], <code>environment.sessionVariables</code>, and <code>environment.profileRelativeSessionVariables</code>. For example, for the [https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html#variables XDG Base Directory Specification], the following could be set to <code>/etc/nixos/configuration.nix</code>:		Environment variables can be set with [https://search.nixos.org/options?channel=unstable&show=environment.variables&from=0&size=50&sort=relevance&type=packages&query=environment.variables <code>environment.variables</code> ], [ https://search.nixos.org/options?channel=23.11&show=environment.sessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.sessionVariables <code>environment.sessionVariables</code> ], and [ https://search.nixos.org/options?channel=unstable&show=environment.profileRelativeSessionVariables&from=0&size=50&sort=relevance&type=packages&query=environment.profileRelativeSessionVariables <code>environment.profileRelativeSessionVariables</code>] . environment.variables are global variables set on shell initialization, whereas environment.sessionVariables and environment.profileRelativeSessionVariables are initialized through PAM. For example, for the [https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html#variables XDG Base Directory Specification], the following could be set to <code>/etc/nixos/configuration.nix</code>:

	<syntaxhighlight lang="nix">		<syntaxhighlight lang="nix">