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doc/values: Refer to base directory
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1 changed files with 3 additions and 3 deletions
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is not a path: it's parsed as an expression that selects the
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attribute `sh` from the variable `builder`. If the file name is
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relative, i.e., if it does not begin with a slash, it is made
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absolute at parse time relative to the directory of the Nix
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expression that contained it. For instance, if a Nix expression in
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absolute at parse time relative to the [base directory](@docroot@/glossary.md#gloss-base-directory).
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For instance, if a Nix expression in
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`/foo/bar/bla.nix` refers to `../xyzzy/fnord.nix`, the absolute path
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is `/foo/xyzzy/fnord.nix`.
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e.g. `~/foo` would be equivalent to `/home/edolstra/foo` for a user
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whose home directory is `/home/edolstra`.
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For instance, evaluating `"${./foo.txt}"` will cause `foo.txt` in the current directory to be copied into the Nix store and result in the string `"/nix/store/<hash>-foo.txt"`.
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For instance, evaluating `"${./foo.txt}"` will cause `foo.txt` in the base directory to be copied into the Nix store and result in the string `"/nix/store/<hash>-foo.txt"`.
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Note that the Nix language assumes that all input files will remain _unchanged_ while evaluating a Nix expression.
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For example, assume you used a file path in an interpolated string during a `nix repl` session.
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