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Diffstat (limited to 'doc/manual/src/expressions/builtin-constants.md')
| -rw-r--r-- | doc/manual/src/expressions/builtin-constants.md | 20 |
1 files changed, 0 insertions, 20 deletions
diff --git a/doc/manual/src/expressions/builtin-constants.md b/doc/manual/src/expressions/builtin-constants.md deleted file mode 100644 index 78d066a82..000000000 --- a/doc/manual/src/expressions/builtin-constants.md +++ /dev/null @@ -1,20 +0,0 @@ -# Built-in Constants - -Here are the constants built into the Nix expression evaluator: - - - `builtins`\ - The set `builtins` contains all the built-in functions and values. - You can use `builtins` to test for the availability of features in - the Nix installation, e.g., - - ```nix - if builtins ? getEnv then builtins.getEnv "PATH" else "" - ``` - - This allows a Nix expression to fall back gracefully on older Nix - installations that don’t have the desired built-in function. - - - [`builtins.currentSystem`]{#builtins-currentSystem}\ - The built-in value `currentSystem` evaluates to the Nix platform - identifier for the Nix installation on which the expression is being - evaluated, such as `"i686-linux"` or `"x86_64-darwin"`. |