diff --git a/flake.lock b/flake.lock
new file mode 100644
index 00000000..f8964420
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,61 @@
+{
+  "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": 1766651565,
+        "narHash": "sha256-QEhk0eXgyIqTpJ/ehZKg9IKS7EtlWxF3N7DXy42zPfU=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "3e2499d5539c16d0d173ba53552a4ff8547f4539",
+        "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.nix b/flake.nix
new file mode 100644
index 00000000..a616b077
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,119 @@
+{
+  description = "Irssi - A modular text mode chat client with IRC support";
+
+  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.${system};
+
+        # Common build inputs for both the package and dev shell
+        buildInputs = with pkgs; [
+          glib
+          openssl
+          ncurses
+          perl
+        ] ++ pkgs.lib.optionals pkgs.stdenv.isLinux [
+          utf8proc
+        ];
+
+        # Native build inputs (tools needed at build time)
+        nativeBuildInputs = with pkgs; [
+          meson
+          ninja
+          pkg-config
+          perl
+        ];
+
+      in
+      {
+        packages = {
+          default = self.packages.${system}.irssi;
+
+          irssi = pkgs.stdenv.mkDerivation {
+            pname = "irssi";
+            version = "1.5-head";
+
+            src = ./.;
+
+            inherit nativeBuildInputs buildInputs;
+
+            mesonFlags = [
+              "-Dwith-perl=yes"
+              "-Dwith-proxy=yes"
+            ];
+
+            meta = with pkgs.lib; {
+              description = "A modular text mode chat client with IRC support";
+              homepage = "https://irssi.org/";
+              license = licenses.gpl2Plus;
+              maintainers = [];
+              platforms = platforms.unix;
+            };
+          };
+
+          # Variant without Perl scripting support
+          irssi-minimal = pkgs.stdenv.mkDerivation {
+            pname = "irssi-minimal";
+            version = "1.5-head";
+
+            src = ./.;
+
+            nativeBuildInputs = with pkgs; [
+              meson
+              ninja
+              pkg-config
+              perl  # Perl is needed at build time for generating help files
+            ];
+
+            buildInputs = with pkgs; [
+              glib
+              openssl
+              ncurses
+            ];
+
+            mesonFlags = [
+              "-Dwith-perl=no"
+            ];
+
+            meta = with pkgs.lib; {
+              description = "A modular text mode chat client with IRC support (minimal build)";
+              homepage = "https://irssi.org/";
+              license = licenses.gpl2Plus;
+              platforms = platforms.unix;
+            };
+          };
+        };
+
+        devShells.default = pkgs.mkShell {
+          name = "irssi-dev";
+
+          inherit buildInputs;
+
+          nativeBuildInputs = nativeBuildInputs ++ (with pkgs; [
+            # Additional development tools
+            gdb
+            valgrind
+          ] ++ pkgs.lib.optionals pkgs.stdenv.isLinux [
+            strace
+          ]);
+
+          shellHook = ''
+            echo "Irssi development environment"
+            echo ""
+            echo "Build commands:"
+            echo "  meson setup Build"
+            echo "  ninja -C Build"
+            echo ""
+            echo "Run tests:"
+            echo "  ninja -C Build test"
+            echo ""
+          '';
+        };
+      }
+    );
+}