add basic deno flake

.gitignore

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+.deno*
+.emacs*
+result

flake.lock

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+{
+  "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": 1753939845,
+        "narHash": "sha256-K2ViRJfdVGE8tpJejs8Qpvvejks1+A4GQej/lBk5y7I=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "94def634a20494ee057c76998843c015909d6311",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "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
+}

flake.nix

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+{
+  description = "Deno development environment";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+        toDenoTarget = system:
+          let
+            arch = builtins.head (builtins.split "-" system);
+            os = builtins.elemAt (builtins.split "-" system) 1;
+            vendor = if os == "darwin" then "apple" else "unknown";
+            sys = if os == "darwin" then "darwin" else "linux-gnu";
+          in "${arch}-${vendor}-${sys}";
+
+        target = toDenoTarget system;
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            deno
+          ];
+
+          shellHook = ''
+            echo "🦕 Deno development environment loaded!"
+            echo "Deno version: $(deno --version | head -n1)"
+          '';
+
+          DENO_DIR = "./.deno_cache";
+        };
+
+        # unfortunately this derivation is impure because
+        # managing deno's deps is HARD, so
+        # nix build --option sanbox relaxed
+        packages.default = import ./package.nix {
+          inherit pkgs;
+          inherit target;
+
+          name = "test-grimu-r-deno-app";
+        };
+
+        apps.default = {
+          type = "app";
+          program = toString (pkgs.writeShellScript "run-deno-app" ''
+            export DENO_DIR="./.deno_cache"
+            exec ${pkgs.deno}/bin/deno run main.ts "$@"
+          '');
+        };
+
+      });
+}

main.ts

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+import jqModule from "npm:jq-web";
+console.log("I'M ALIVE");

package.nix

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+{ pkgs, target, name }:
+pkgs.stdenv.mkDerivation rec {
+  pname = name;
+  version = "0.1.0";
+  src = ./.;
+
+  __noChroot = true;
+  
+  dontStrip = true;
+
+  denort = pkgs.fetchurl {
+    url = "https://dl.deno.land/release/v${pkgs.deno.version}/denort-${target}.zip";
+    hash = "sha256-J2LfvHPbJvcOpbQOd6EmGxHDciez7tG10etK4bqQhLI=";
+  };
+
+  nativeBuildInputs = with pkgs; [ deno unzip ];
+
+  configurePhase = ''
+    export DENO_DIR=./.deno_cache;
+    mkdir -p $TMPDIR/denort
+    pushd $TMPDIR/denort
+    unzip ${denort}
+    chmod +x denort
+    popd
+  '';
+
+  buildPhase = ''
+    runHook preBuild
+
+    export DENORT_BIN="$TMPDIR/denort/denort"
+
+    deno compile --output app main.ts --target=${target}
+    runHook postBuild
+  '';
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp app $out/bin/${name}
+  '';
+}