diff --git a/_bashrc b/_bashrc
index f51f3d6..4b7efe5 100755
--- a/_bashrc
+++ b/_bashrc
@@ -24,6 +24,10 @@ mkcd() {
     cd "$1"
 }
 
+if [ "$PREFERRED_SHELL" = zsh ] && command -v ls > /dev/null; then
+    exec zsh
+fi
+
 export PS1="
 $(tput bold)$(tput setaf 1)[$(tput setaf 3)\u$(tput setaf 2)@$(tput setaf 4)\H $(tput setaf 5)\w$(tput setaf 1)]$(tput setaf 7)
 $ $(tput sgr0)"
diff --git a/_zshrc b/_zshrc
index dda566f..c23809d 100755
--- a/_zshrc
+++ b/_zshrc
@@ -30,6 +30,7 @@ function zle-keymap-select {
 }
 zle -N zle-keymap-select
 
+unset PREFERRED_SHELL
 [ -f "$HOME/./config/bashrc" ] && emulate sh -c "source $HOME/./config/bashrc"
 [ -f "$HOME/.bashrc" ] && emulate sh -c "source $HOME/.bashrc"
 
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..b47c648
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,268 @@
+{
+  "nodes": {
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1747046372,
+        "narHash": "sha256-CIVLLkVgvHYbgI2UpXvIIBJ12HWgX+fjA8Xf8PUmqCY=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "9100a0f413b0c601e0533d1d94ffd501ce2e7885",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-compat_2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1747046372,
+        "narHash": "sha256-CIVLLkVgvHYbgI2UpXvIIBJ12HWgX+fjA8Xf8PUmqCY=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "9100a0f413b0c601e0533d1d94ffd501ce2e7885",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": [
+          "neovim-nightly-overlay",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1756770412,
+        "narHash": "sha256-+uWLQZccFHwqpGqr2Yt5VsW/PbeJVTn9Dk6SHWhNRPw=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "4524271976b625a4a605beefd893f270620fd751",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "flake-parts_2": {
+      "inputs": {
+        "nixpkgs-lib": [
+          "neovim-nightly-overlay",
+          "hercules-ci-effects",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1754487366,
+        "narHash": "sha256-pHYj8gUBapuUzKV/kN/tR3Zvqc7o6gdFB9XKXIp1SQ8=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "af66ad14b28a127c5c0f3bbb298218fc63528a18",
+        "type": "github"
+      },
+      "original": {
+        "id": "flake-parts",
+        "type": "indirect"
+      }
+    },
+    "git-hooks": {
+      "inputs": {
+        "flake-compat": "flake-compat_2",
+        "gitignore": "gitignore",
+        "nixpkgs": [
+          "neovim-nightly-overlay",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1757239681,
+        "narHash": "sha256-E9spYi9lxm2f1zWQLQ7xQt8Xs2nWgr1T4QM7ZjLFphM=",
+        "owner": "cachix",
+        "repo": "git-hooks.nix",
+        "rev": "ab82ab08d6bf74085bd328de2a8722c12d97bd9d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "repo": "git-hooks.nix",
+        "type": "github"
+      }
+    },
+    "gitignore": {
+      "inputs": {
+        "nixpkgs": [
+          "neovim-nightly-overlay",
+          "git-hooks",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1709087332,
+        "narHash": "sha256-HG2cCnktfHsKV0s4XW83gU3F57gaTljL9KNSuG6bnQs=",
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "rev": "637db329424fd7e46cf4185293b9cc8c88c95394",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "type": "github"
+      }
+    },
+    "hercules-ci-effects": {
+      "inputs": {
+        "flake-parts": "flake-parts_2",
+        "nixpkgs": [
+          "neovim-nightly-overlay",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1755233722,
+        "narHash": "sha256-AavrbMltJKcC2Fx0lfJoZfmy7g87ebXU0ddVenhajLA=",
+        "owner": "hercules-ci",
+        "repo": "hercules-ci-effects",
+        "rev": "99e03e72e3f7e13506f80ef9ebaedccb929d84d0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "hercules-ci-effects",
+        "type": "github"
+      }
+    },
+    "home-manager": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1726989464,
+        "narHash": "sha256-Vl+WVTJwutXkimwGprnEtXc/s/s8sMuXzqXaspIGlwM=",
+        "owner": "nix-community",
+        "repo": "home-manager",
+        "rev": "2f23fa308a7c067e52dfcc30a0758f47043ec176",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "ref": "release-24.05",
+        "repo": "home-manager",
+        "type": "github"
+      }
+    },
+    "neovim-nightly-overlay": {
+      "inputs": {
+        "flake-compat": "flake-compat",
+        "flake-parts": "flake-parts",
+        "git-hooks": "git-hooks",
+        "hercules-ci-effects": "hercules-ci-effects",
+        "neovim-src": "neovim-src",
+        "nixpkgs": "nixpkgs",
+        "treefmt-nix": "treefmt-nix"
+      },
+      "locked": {
+        "lastModified": 1757462715,
+        "narHash": "sha256-SsxK5ZIZaftnMQTuAmkb9NuBpXBqAVvmA1/We4qb+nQ=",
+        "owner": "nix-community",
+        "repo": "neovim-nightly-overlay",
+        "rev": "9242945341c151dfcd41b02b04ff59dd8fb761ce",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "neovim-nightly-overlay",
+        "type": "github"
+      }
+    },
+    "neovim-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1757462013,
+        "narHash": "sha256-OZRjMnuDw0DCpKZHU62VI6+TJ5wUvD/+qIrbGmGBBzk=",
+        "owner": "neovim",
+        "repo": "neovim",
+        "rev": "f6ed46c2a747a697c6b301dd35fcc9c7b4d175ab",
+        "type": "github"
+      },
+      "original": {
+        "owner": "neovim",
+        "repo": "neovim",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1757034884,
+        "narHash": "sha256-PgLSZDBEWUHpfTRfFyklmiiLBE1i1aGCtz4eRA3POao=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "ca77296380960cd497a765102eeb1356eb80fed0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1735563628,
+        "narHash": "sha256-OnSAY7XDSx7CtDoqNh8jwVwh4xNL/2HaJxGjryLWzX8=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "b134951a4c9f3c995fd7be05f3243f8ecd65d798",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-24.05",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "home-manager": "home-manager",
+        "neovim-nightly-overlay": "neovim-nightly-overlay",
+        "nixpkgs": "nixpkgs_2"
+      }
+    },
+    "treefmt-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "neovim-nightly-overlay",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1756662192,
+        "narHash": "sha256-F1oFfV51AE259I85av+MAia221XwMHCOtZCMcZLK2Jk=",
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "rev": "1aabc6c05ccbcbf4a635fb7a90400e44282f61c4",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
index dbf71a3..08e399f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -93,6 +93,7 @@
             fzf-zsh
             thefuck
             rust-analyzer
+            jq
           ];
 
           # Link dotfiles without forcing overwrite (fails safely if a file already exists)
@@ -114,6 +115,7 @@
           # Environment variables only for this user/session
           home.sessionVariables = {
             EDITOR = "nvim";
+            PREFERRED_SHELL = "zsh";
           };
 
           # Good HM hygiene