diff --git a/README.md b/README.md
index 9fb1abf..7873ebf 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,10 @@
 * simple-shell: Some shells;
 * hello-versions: Choosing some package version;
 * samples: A directory with found exicting recipes!
+* flake-basic: A really basic flake
+* flake-basic-platform: A slighly more complex flake, with more targets
+* flake-mkDerivation: A flake with a ... mkDerivation
+* flake-rust-devshell: A flake with a rust overlay
 
 
 ## Building, running, deleting
@@ -63,4 +67,4 @@ It will be needed to wipe the profile history and the `result` link to be able t
   * https://nix.dev/tutorials/nixos/building-and-running-docker-images.html
   * https://mitchellh.com/writing/nix-with-dockerfiles
   * https://jameswillia.ms/posts/go-nix-containers.html
-  
\ No newline at end of file
+  
diff --git a/flake-mkDerivation/flake.lock b/flake-mkDerivation/flake.lock
new file mode 100644
index 0000000..994fb9c
--- /dev/null
+++ b/flake-mkDerivation/flake.lock
@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1710631334,
+        "narHash": "sha256-rL5LSYd85kplL5othxK5lmAtjyMOBg390sGBTb3LRMM=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "c75037bbf9093a2acb617804ee46320d6d1fea5a",
+        "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
+}
diff --git a/flake-mkDerivation/flake.nix b/flake-mkDerivation/flake.nix
new file mode 100644
index 0000000..b78eeec
--- /dev/null
+++ b/flake-mkDerivation/flake.nix
@@ -0,0 +1,54 @@
+# Source: https://fasterthanli.me/series/building-a-rust-service-with-nix/part-10#a-flake-with-derivation
+# nix build .#packages.x86_64-linux.shaka-packager
+# nix build .#shaka-packager
+{
+  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
+        name = "simple";
+        src = ./.;
+        pkgs = nixpkgs.legacyPackages.${system};
+      in
+      {
+        packages.default = derivation {
+          inherit system name src;
+          builder = with pkgs; "${bash}/bin/bash";
+          args = [ "-c" "echo foo > $out" ];
+        };
+        packages.shaka-packager =
+          let
+            version = "2.6.1";
+            inherit (pkgs) stdenv lib;
+          in
+          stdenv.mkDerivation
+            {
+              name = "shaka-packager-${version}";
+
+              # https://nixos.wiki/wiki/Packaging/Binaries
+              src = pkgs.fetchurl {
+                url =
+                  "https://github.com/shaka-project/shaka-packager/releases/download/v${version}/packager-linux-x64";
+                sha256 = "sha256-MoMX6PEtvPmloXJwRpnC2lHlT+tozsV4dmbCqweyyI0=";
+              };
+
+              dontUnpack = true;
+              sourceRoot = ".";
+
+              installPhase = ''
+                install -m755 -D $src $out/bin/shaka-packager
+              '';
+
+              meta = with nixpkgs.lib; {
+                homepage = "https://shaka-project.github.io/shaka-packager/html/";
+                description =
+                  "Media packaging framework for VOD and Live DASH and HLS applications";
+                platforms = platforms.linux;
+              };
+            };
+      }
+    );
+}
\ No newline at end of file
diff --git a/flake-multi-platform/README.md b/flake-multi-platform/README.md
index 08876ac..224af98 100644
--- a/flake-multi-platform/README.md
+++ b/flake-multi-platform/README.md
@@ -1,5 +1,7 @@
 # flake-multi-platform
 
+## Targets
+
 ```
 > nix build
 ...
@@ -17,3 +19,11 @@ git+file:///home/mycroft/dev/nix-samples?dir=flake-multi-platform
     └───x86_64-linux
         └───default: package 'simple'
 ```
+
+## Building
+
+```
+> nix build .
+> nix build .#default
+> nix build .#packages.x86_64-linux
+```
diff --git a/flake-rust-devshell/flake.lock b/flake-rust-devshell/flake.lock
new file mode 100644
index 0000000..3992879
--- /dev/null
+++ b/flake-rust-devshell/flake.lock
@@ -0,0 +1,85 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1710631334,
+        "narHash": "sha256-rL5LSYd85kplL5othxK5lmAtjyMOBg390sGBTb3LRMM=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "c75037bbf9093a2acb617804ee46320d6d1fea5a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "flake-utils": [
+          "flake-utils"
+        ],
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1710727870,
+        "narHash": "sha256-Ulsx+t4SnRmjMJx4eF2Li+3rBGYhZp0XNShVjIheCfg=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "a1b17cacfa7a6ed18f553a195a047f4e73e95da9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
+    "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
+}
diff --git a/flake-rust-devshell/flake.nix b/flake-rust-devshell/flake.nix
new file mode 100644
index 0000000..be757b5
--- /dev/null
+++ b/flake-rust-devshell/flake.nix
@@ -0,0 +1,32 @@
+# https://fasterthanli.me/series/building-a-rust-service-with-nix/part-10#a-flake-with-derivation
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+    rust-overlay = {
+      url = "github:oxalica/rust-overlay";
+      inputs = {
+        nixpkgs.follows = "nixpkgs";
+        flake-utils.follows = "flake-utils";
+      };
+    };
+  };
+  outputs = { self, nixpkgs, flake-utils, rust-overlay }:
+    flake-utils.lib.eachDefaultSystem
+      (system:
+        let
+          overlays = [ (import rust-overlay) ];
+          pkgs = import nixpkgs {
+            inherit system overlays;
+          };
+          rustToolchain = pkgs.pkgsBuildHost.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
+        in
+        with pkgs;
+        {
+          devShells.default = mkShell {
+            # buildInputs = [ rust-bin.stable.latest.default ];
+            buildInputs = [ rustToolchain ];
+          };
+        }
+      );
+}
\ No newline at end of file
diff --git a/flake-rust-devshell/rust-toolchain.toml b/flake-rust-devshell/rust-toolchain.toml
new file mode 100644
index 0000000..ecef085
--- /dev/null
+++ b/flake-rust-devshell/rust-toolchain.toml
@@ -0,0 +1,5 @@
+[toolchain]
+channel = "nightly-2020-07-10"
+components = [ "rustfmt", "rustc-dev" ]
+targets = [ "x86_64-unknown-linux-gnu" ]
+profile = "minimal"