Have a good crack at trying to get a naersk-based flake working

It falls over because it needs the dev DB creating before building :-(

nix_flake/flake.lock

@@ -0,0 +1,74 @@
+{
+  "nodes": {
+    "naersk": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1648544490,
+        "narHash": "sha256-EoBDcccV70tfz2LAs5lK0BjC7en5mzUVlgLsd5E6DW4=",
+        "owner": "nix-community",
+        "repo": "naersk",
+        "rev": "e30ef9a5ce9b3de8bb438f15829c50f9525ca730",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "naersk",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1648219316,
+        "narHash": "sha256-Ctij+dOi0ZZIfX5eMhgwugfvB+WZSrvVNAyAuANOsnQ=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "30d3d79b7d3607d56546dd2a6b49e156ba0ec634",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1648219316,
+        "narHash": "sha256-Ctij+dOi0ZZIfX5eMhgwugfvB+WZSrvVNAyAuANOsnQ=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "30d3d79b7d3607d56546dd2a6b49e156ba0ec634",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "naersk": "naersk",
+        "nixpkgs": "nixpkgs_2",
+        "utils": "utils"
+      }
+    },
+    "utils": {
+      "locked": {
+        "lastModified": 1648297722,
+        "narHash": "sha256-W+qlPsiZd8F3XkzXOzAoR+mpFqzm3ekQkJNa+PIh1BQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "0f8662f1319ad6abf89b3380dd2722369fc51ade",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

nix_flake/flake.nix

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+{
+  description = "QuickPeep Search Engine Flake for Nix";
+
+  inputs = {
+    utils.url = "github:numtide/flake-utils";
+    naersk.url = "github:nix-community/naersk";
+  };
+
+  outputs = { self, nixpkgs, utils, naersk }:
+    utils.lib.eachDefaultSystem (system: let
+      pkgs = nixpkgs.legacyPackages."${system}";
+      naersk-lib = naersk.lib."${system}";
+    in rec {
+      # `nix build`
+      packages.quickpeep = naersk-lib.buildPackage {
+        pname = "quickpeep";
+        root = ./..;
+        buildInputs = with pkgs; [
+          openssl
+          pkgconfig
+
+        ];
+        nativeBuildInputs = with pkgs; [
+          # Idea from https://github.com/NixOS/nixpkgs/blob/634141959076a8ab69ca2cca0f266852256d79ee/pkgs/servers/matrix-conduit/default.nix
+          pkgs.rust.packages.stable.rustPlatform.bindgenHook
+        ];
+      };
+      defaultPackage = packages.quickpeep;
+
+      # `nix run`
+      apps.quickpeep = utils.lib.mkApp {
+        drv = packages.quickpeep;
+      };
+      defaultApp = apps.quickpeep;
+
+      # `nix develop`
+      devShell = pkgs.mkShell {
+        nativeBuildInputs = with pkgs; [ rustc cargo ];
+      };
+    });
+}