vault backup: 2025-01-08 10:48:09

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diff --git a/3 resources/nix/language/keyword-import.md b/3 resources/nix/language/keyword-import.md
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+The import keyword brings a Nix expression from another source into scope such that we can reference it. For example, we can `import <nixpkgs>` and it would bring the entire attribute set that is Nixpkgs into scope and allows us to reference any of its attributes.
+
diff --git a/3 resources/nix/language/keyword-let.md b/3 resources/nix/language/keyword-let.md
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+Keyword: `let`
+Used to assign variables that can be used in an expression immediately following the let-binding.
+```nix
+let
+  one = 1;
+in {
+  two = one + 1;
+}
+```
diff --git a/3 resources/nix/language/keyword-rec.md b/3 resources/nix/language/keyword-rec.md
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+Recursive attribute sets can reference values declared earlier in the same set. 
+keyword: `rec`
+```nix
+rec {
+  one = 1;
+  two = one + 1;
+}
+```
+
+Ordering does not matter:
+```nix
+nix-repl> rec { two = one + 1; one = 1; }
+{
+  one = 1;
+  two = 2;
+}
+```
diff --git a/3 resources/nix/language/keyword-with.md b/3 resources/nix/language/keyword-with.md
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+The  `with` keyword brings all attributes from a given set, e.g nixpkgs, into the local scope. Making them accessible as if they were declared in the same file.
+
+An example, bringing everything from nixpkgs into scope:
+```
+with import <nixpkgs>;
+with python310Packages; <-- declared in nixpkgs
+
+buildPythonPackage <-- declared in python310Packages
+```
+
+The import statement is required here because imports a nix expression from another source, in this case nixpkgs.
+It is not required at line two, because python310Packages itself is already in the local scope.
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