diff --git a/modules/lib/default.nix b/modules/lib/default.nix
index 8291be0b..9ca0dad6 100644
--- a/modules/lib/default.nix
+++ b/modules/lib/default.nix
@@ -17,4 +17,5 @@
       };
 
   shell = import ./shell.nix { inherit lib; };
+  zsh = import ./zsh.nix { inherit lib; };
 }
diff --git a/modules/lib/zsh.nix b/modules/lib/zsh.nix
new file mode 100644
index 00000000..1d3e96b5
--- /dev/null
+++ b/modules/lib/zsh.nix
@@ -0,0 +1,28 @@
+{ lib }:
+
+rec {
+  # Produces a Zsh shell like value
+  toZshValue = v: if builtins.isBool v then
+                    if v then "true" else "false"
+                  else if builtins.isString v then
+                    "\"${v}\""
+                  else if builtins.isList v then
+                    "(${lib.concatStringsSep " " (map toZshValue v)})"
+                  else "\"${toString v}\"";
+
+  # Produces a Zsh shell like definition statement
+  define = n: v: "${n}=${toZshValue v}";
+
+  # Given an attribute set containing shell variable names and their
+  # assignments, this function produces a string containing a definition
+  # statement for each set entry.
+  defineAll = vars: lib.concatStringsSep "\n" (lib.mapAttrsToList define vars);
+
+  # Produces a Zsh shell like export statement
+  export = n: v: "export ${define n v}";
+
+  # Given an attribute set containing shell variable names and their
+  # assignments, this function produces a string containing an export
+  # statement for each set entry.
+  exportAll = vars: lib.concatStringsSep "\n" (lib.mapAttrsToList export vars);
+}