diff --git a/source/recipes/devshell/env-var/main.adoc0 b/source/recipes/devshell/env-var/main.adoc0
index ca73c2b..be12d2e 100644
--- a/source/recipes/devshell/env-var/main.adoc0
+++ b/source/recipes/devshell/env-var/main.adoc0
@@ -23,7 +23,7 @@ Here's a demonstration using the shell.
 ....
 $ echo "FOO=${FOO}"
 $# ../../../../../start-shell nix develop <<EOL
-$# echo 'echo "FOO=${FOO}"'
+$# echo echo '"''FOO=${FOO}''"'
 $# env | grep FOO | grep -v shellHook
 $# EOL
 ....
diff --git a/source/recipes/devshell/env-var/tempwork/flake.lock b/source/recipes/devshell/env-var/tempwork/flake.lock
new file mode 100644
index 0000000..73a8aba
--- /dev/null
+++ b/source/recipes/devshell/env-var/tempwork/flake.lock
@@ -0,0 +1,60 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1757177463,
+        "narHash": "sha256-+0iaqsEjfaIZMuRNGO+wC0uVazT5b+W38wB7Uv0kA5Y=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "9aaf71a4a74d835ec05ac3ddf5fc1b859e005c41",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/source/recipes/devshell/env-var/tempwork/flake.nix b/source/recipes/devshell/env-var/tempwork/flake.nix
new file mode 100644
index 0000000..7d462f8
--- /dev/null
+++ b/source/recipes/devshell/env-var/tempwork/flake.nix
@@ -0,0 +1,22 @@
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+      in
+      {
+        devShells = rec {
+          default = pkgs.mkShell {
+            shellHook = ''
+              export FOO="bar"
+            '';
+          };
+        };
+      }
+    );
+}