diff --git a/default.nix b/default.nix
deleted file mode 100644
index faecc41..0000000
--- a/default.nix
+++ /dev/null
@@ -1,35 +0,0 @@
-{ pkgs ? import <nixpkgs> {} }:
-
-with pkgs;
-
-stdenv.mkDerivation {
-  name = "nixos-channel-scripts";
-
-  buildInputs = with perlPackages;
-    [ pkgconfig nix sqlite makeWrapper perl FileSlurp LWP LWPProtocolHttps ListMoreUtils DBDSQLite NetAmazonS3 boehmgc nlohmann_json boost ];
-
-  buildCommand = ''
-    mkdir -p $out/bin
-
-    cp ${./file-cache.hh} file-cache.hh
-
-    g++ -Os -g ${./generate-programs-index.cc} -Wall -std=c++14 -o $out/bin/generate-programs-index -I . \
-      $(pkg-config --cflags nix-main) \
-      $(pkg-config --libs nix-main) \
-      $(pkg-config --libs nix-expr) \
-      $(pkg-config --libs nix-store) \
-      -lsqlite3 -lgc
-
-    g++ -Os -g ${./index-debuginfo.cc} -Wall -std=c++14 -o $out/bin/index-debuginfo -I . \
-      $(pkg-config --cflags nix-main) \
-      $(pkg-config --libs nix-main) \
-      $(pkg-config --libs nix-store) \
-      -lsqlite3
-
-    cp ${./mirror-nixos-branch.pl} $out/bin/mirror-nixos-branch
-    wrapProgram $out/bin/mirror-nixos-branch --set PERL5LIB $PERL5LIB --prefix PATH : ${wget}/bin:${git}/bin:${nix}/bin:${gnutar}/bin:${xz}/bin:${rsync}/bin:${openssh}/bin:$out/bin
-
-    patchShebangs $out/bin
-  '';
-
-}
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..5730064
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,11 @@
+{
+    "inputs": {
+        "nixpkgs": {
+            "inputs": {},
+            "narHash": "sha256-HKuPcp/pBpKNBOnDlrSzObee5eB0LdzhI0RpRjTVxik=",
+            "originalUrl": "nixpkgs/release-19.09",
+            "url": "github:edolstra/nixpkgs/03f3def66a104a221aac8b751eeb7075374848fd"
+        }
+    },
+    "version": 3
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..2437513
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,53 @@
+{
+  edition = 201909;
+
+  description = "Script for generating Nixpkgs/NixOS channels";
+
+  inputs.nixpkgs.url = "nixpkgs/release-19.09";
+
+  outputs = { self, nixpkgs }:
+
+    {
+
+      overlay = final: prev: {
+
+        nixos-channel-scripts = with final; stdenv.mkDerivation {
+          name = "nixos-channel-scripts";
+
+          buildInputs = with perlPackages;
+            [ pkgconfig nix sqlite makeWrapper perl FileSlurp LWP LWPProtocolHttps ListMoreUtils DBDSQLite NetAmazonS3 boehmgc nlohmann_json boost ];
+
+          buildCommand = ''
+            mkdir -p $out/bin
+
+            cp ${./file-cache.hh} file-cache.hh
+
+            g++ -Os -g ${./generate-programs-index.cc} -Wall -std=c++14 -o $out/bin/generate-programs-index -I . \
+              $(pkg-config --cflags nix-main) \
+              $(pkg-config --libs nix-main) \
+              $(pkg-config --libs nix-expr) \
+              $(pkg-config --libs nix-store) \
+              -lsqlite3 -lgc
+
+            g++ -Os -g ${./index-debuginfo.cc} -Wall -std=c++14 -o $out/bin/index-debuginfo -I . \
+              $(pkg-config --cflags nix-main) \
+              $(pkg-config --libs nix-main) \
+              $(pkg-config --libs nix-store) \
+              -lsqlite3
+
+            cp ${./mirror-nixos-branch.pl} $out/bin/mirror-nixos-branch
+            wrapProgram $out/bin/mirror-nixos-branch --set PERL5LIB $PERL5LIB --prefix PATH : ${wget}/bin:${git}/bin:${nix}/bin:${gnutar}/bin:${xz}/bin:${rsync}/bin:${openssh}/bin:$out/bin
+
+            patchShebangs $out/bin
+          '';
+        };
+
+      };
+
+      defaultPackage.x86_64-linux = (import nixpkgs {
+        system = "x86_64-linux";
+        overlays = [ self.overlay ];
+      }).nixos-channel-scripts;
+
+    };
+}