examples: add flake.nix to each example

This makes hte examples more standalone and suitable for copy & paste

examples/packages/basics/derivation/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/basics/htop-with-flags/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/basics/mkDerivation/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/multi-language/python-nodejs/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/single-language/haskell-cabal/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/single-language/nodejs-devshell/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/single-language/nodejs-node-modules/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/single-language/nodejs-package-v3-builder/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/single-language/nodejs-package-v3-lock/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/single-language/nodejs-package/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/single-language/nodejs-project/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/single-language/php-package/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/single-language/python-local-dependencies/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/single-language/python-local-dependencies/lock.json

@@ -2,12 +2,12 @@
   "fetchPipMetadata": {
     "sources": {
       "subpkg1": {
-        "path": "examples/packages/single-language/python-local-dependencies/subpkg1",
+        "path": "subpkg1",
         "type": "local",
         "version": "0.0.1"
       },
       "subpkg2": {
-        "path": "examples/packages/single-language/python-local-dependencies/subpkg2",
+        "path": "subpkg2",
         "type": "local",
         "version": "0.0.2"
       }
@@ -21,5 +21,5 @@
       }
     }
   },
-  "invalidationHash": "226b1267f23fd3705dd88929c9eb630aececd273204130ad42f13a4f7b8e35ca"
-}
+  "invalidationHash": "bc71d202ddaae6e0f6c82dd44fd81ed0c6971b9a18e84a24d633365be1ef30fb"
+}

examples/packages/single-language/python-machine-learning/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/single-language/python-package-ansible/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/single-language/python-package-apache-airflow/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/single-language/python-package-odoo/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/single-language/python-package-pillow/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/single-language/python-project/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/single-language/rust-package-buildRustPackage/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/single-language/rust-package/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/single-language/rust-workspace/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

examples/packages/single-language/spago-project/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

modules/dream2nix/core/paths/interface.nix

@@ -30,7 +30,7 @@ in {
         path = toString path';
       in
         if path == projectRoot
-        then "./."
+        then "."
         else if lib.hasPrefix projectRoot path
         then lib.path.subpath.normalise "./${lib.removePrefix projectRoot path}"
         else lib.path.subpath.normalise "./${path}";

modules/flake-parts/examples.nix

@@ -26,8 +26,8 @@
   in
     flip mapAttrs examples
     (name: _: {
-      module = examplesPath + "/${name}";
-      packagePath = "/examples/packages/${dirName}/${name}";
+      dir = examplesPath + "/${name}";
+      flake = examplesPath + "/${name}/flake.nix";
     });
 
   importFlake = flakeFile: let
@@ -51,14 +51,19 @@
   modulesFlake = import (self + /modules) {};
 
   # Type: [ {${name} = {module, packagePath} ]
-  allExamples = mapAttrsToList (dirName: _: readExamples dirName) packageCategories;
+  allExamplesList = mapAttrsToList (dirName: _: readExamples dirName) packageCategories;
 
-  exampleModules = foldl (a: b: a // b) {} allExamples;
+  exampleFlakes = foldl (a: b: a // b) {} allExamplesList;
 
   # create a template for each example package
-  packageTempaltes = flip mapAttrs exampleModules (name: def: {
+  packageTempaltes = flip mapAttrs exampleFlakes (name: def: {
     description = "Example package ${name}";
-    path = def.module;
+    path = def.dir;
+  });
+
+  allExamples = flip mapAttrs' exampleFlakes (name: example: {
+    name = "example-package-${name}";
+    value = example.flake;
   });
 in {
   flake.templates =
@@ -77,48 +82,18 @@ in {
     pkgs,
     ...
   }: let
-    # A module imported into every package setting up the eval cache
-    setup = {config, ...}: {
-      paths.projectRoot = self;
-      eval-cache.enable = true;
-      deps.npm = inputs.nixpkgs.legacyPackages.${system}.nodejs.pkgs.npm.override (old: rec {
-        version = "8.19.4";
-        src = builtins.fetchTarball {
-          url = "https://registry.npmjs.org/npm/-/npm-${version}.tgz";
-          sha256 = "0xmvjkxgfavlbm8cj3jx66mlmc20f9kqzigjqripgj71j6b2m9by";
-        };
-      });
-    };
-
     # evaluates the package behind a given module
-    makeDrv = modules: let
-      evaled = self.lib.evalModules {
-        modules = modules ++ [self.modules.dream2nix.core];
-        packageSets = {
-          nixpkgs = inputs.nixpkgs.legacyPackages.${system};
-          writers = config.writers;
-        };
-      };
+    getPackage = flakeFile: let
+      flake = importFlake flakeFile;
     in
-      evaled.config.public;
-
-    allModules = flip mapAttrs' exampleModules (name: module: {
-      name = "example-package-${name}";
-      value = [
-        module.module
-        setup
-        {
-          paths.package = module.packagePath;
-        }
-      ];
-    });
+      flake.packages.${system}.default;
 
     # map all modules in /examples to a package output in the flake.
     checks =
       lib.optionalAttrs
       (system == "x86_64-linux")
       (
-        (lib.mapAttrs (_: drvModules: makeDrv drvModules) allModules)
+        (lib.mapAttrs (_: flakeFile: getPackage flakeFile) allExamples)
         // {
           example-repo =
             (import (self + /examples/repo) {

modules/flake.lock

@@ -17,6 +17,26 @@
         "type": "github"
       }
     },
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1698579227,
+        "narHash": "sha256-KVWjFZky+gRuWennKsbo6cWyo7c/z/VgCte5pR9pEKg=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "f76e870d64779109e41370848074ac4eaa1606ec",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1695837737,
@@ -73,6 +93,7 @@
     "root": {
       "inputs": {
         "flake-compat": "flake-compat",
+        "flake-parts": "flake-parts",
         "nixpkgs": "nixpkgs",
         "purescript-overlay": "purescript-overlay",
         "pyproject-nix": "pyproject-nix"

scripts/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "My flake with dream2nix packages";
+
+  inputs = {
+    dream2nix.url = "github:nix-community/dream2nix";
+    nixpkgs.follows = "dream2nix/nixpkgs";
+  };
+
+  outputs = inputs @ {
+    self,
+    dream2nix,
+    nixpkgs,
+    ...
+  }: let
+    system = "x86_64-linux";
+  in {
+    # All packages defined in ./packages/<name> are automatically added to the flake outputs
+    # e.g., 'packages/hello/default.nix' becomes '.#packages.hello'
+    packages.${system}.default = dream2nix.lib.evalModules {
+      packageSets.nixpkgs = inputs.dream2nix.inputs.nixpkgs.legacyPackages.${system};
+      modules = [
+        ./default.nix
+        {
+          paths.projectRoot = ./.;
+          # can be changed to ".git" or "flake.nix" to get rid of .project-root
+          paths.projectRootFile = "flake.nix";
+          paths.package = ./.;
+        }
+      ];
+    };
+  };
+}

scripts/update-examples.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+# find script directory
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+# find examples directory
+packagesDir="$DIR/../examples/packages"
+
+# iterate over all double nested package directories and copy the flake file there
+echo "$packagesDir"/*/*/ | xargs -n 1 cp "$DIR"/flake.nix

tests/nix-unit/test_paths/default.nix

@@ -25,7 +25,7 @@ in {
     expr = {inherit (config.paths) projectRoot package;};
     expected = {
       projectRoot = "${./.}";
-      package = "./.";
+      package = ".";
     };
   };