Pin terraform version in flake

flake.lock

@@ -54,11 +54,28 @@
         "type": "github"
       }
     },
+    "nixpkgs-2205": {
+      "locked": {
+        "lastModified": 1672580127,
+        "narHash": "sha256-3lW3xZslREhJogoOkjeZtlBtvFMyxHku7I/9IVehhT8=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "0874168639713f547c05947c76124f78441ea46c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-22.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "devshell": "devshell",
         "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs",
+        "nixpkgs-2205": "nixpkgs-2205",
         "tritonshell-module": "tritonshell-module"
       }
     },

flake.nix

@@ -3,6 +3,7 @@
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    nixpkgs-2205.url = "github:nixos/nixpkgs/nixos-22.05";
 
     flake-utils.url = "github:numtide/flake-utils";
 
@@ -16,7 +17,7 @@
     tritonshell-module.inputs.nixpkgs.follows = "nixpkgs";
   };
 
-  outputs = { self, flake-utils, devshell, tritonshell-module, nixpkgs }:
+  outputs = { self, flake-utils, devshell, tritonshell-module, nixpkgs, nixpkgs-2205 }:
     flake-utils.lib.simpleFlake {
       inherit self nixpkgs;
       name = "infra-project";
@@ -39,6 +40,7 @@
           devshell.packages = with pkgs; [
             # used by triton-ansible-inventory
             nodejs
+            nixpkgs-2205.legacyPackages.${pkgs.system}.terraform
           ];
         };
     };