diff --git a/container/Terraria.nix b/container/Terraria.nix
new file mode 100644
index 0000000..7636c5d
--- /dev/null
+++ b/container/Terraria.nix
@@ -0,0 +1,60 @@
+{
+	config,
+	container,
+	lib,
+	...
+}: let
+	cfg = config.container.module.terraria;
+in {
+	options.container.module.terraria = {
+		enable = lib.mkEnableOption "the Terraria server.";
+		address = lib.mkOption {
+			default = "10.1.0.77";
+			type    = lib.types.str;
+		};
+		port = lib.mkOption {
+			default = 22777;
+			type    = lib.types.int;
+		};
+		storage = lib.mkOption {
+			default = "${config.container.storage}/terraria";
+			type    = lib.types.str;
+		};
+	};
+
+	config = lib.mkIf cfg.enable {
+		systemd.tmpfiles.rules = container.mkContainerDir cfg [
+			"data"
+		];
+
+		containers.terraria = container.mkContainer cfg {
+			bindMounts = {
+				"/var/lib/terraria" = {
+					hostPath   = "${cfg.storage}/data";
+					isReadOnly = false;
+				};
+			};
+
+			config = { pkgs, ... }: container.mkContainerConfig cfg {
+				# NOTE: Admin with `tmux -S /var/lib/terraria/terraria.sock attach-session -t 0`
+				environment.systemPackages = with pkgs; [ tmux ];
+
+				services.terraria = let
+					dataDir = "/var/lib/terraria";
+				in {
+					inherit (cfg) port;
+					inherit dataDir;
+					enable = true;
+					autoCreatedWorldSize = "large";
+					maxPlayers      = 4;
+					messageOfTheDay = "<3";
+					noUPnP          = false;
+					openFirewall    = false;
+					password        = "mishadima143";
+					secure          = false;
+					worldPath       = "${dataDir}/.local/share/Terraria/Worlds/Together.wld";
+				};
+			};
+		};
+	};
+}
diff --git a/host/x86_64-linux/home/Container.nix b/host/x86_64-linux/home/Container.nix
index 1b64a9a..b187616 100644
--- a/host/x86_64-linux/home/Container.nix
+++ b/host/x86_64-linux/home/Container.nix
@@ -32,6 +32,7 @@
 			search.enable   = true;
 			status.enable   = true;
 			stock.enable    = true;
+			terraria.enable = true;
 			vpn.enable      = true;
 			watch.enable    = true;
 			yt.enable       = true;
diff --git a/host/x86_64-linux/home/Network.nix b/host/x86_64-linux/home/Network.nix
index 49be786..9e86fab 100644
--- a/host/x86_64-linux/home/Network.nix
+++ b/host/x86_64-linux/home/Network.nix
@@ -216,10 +216,15 @@ in {
 			+ (mkForward internal cfg.git.portSsh cfg.git.address cfg.git.portSsh tcp)
 
 			# Print serivce.
-			+ (mkForward internal cfg.print.port cfg.print.address cfg.print.port tcp);
+			+ (mkForward internal cfg.print.port cfg.print.address cfg.print.port tcp)
+
+			# Terraria server.
+			+ (mkForward external cfg.terraria.port cfg.terraria.address cfg.terraria.port tcp)
+			+ (mkForward internal cfg.terraria.port cfg.terraria.address cfg.terraria.port tcp)
 
 			# SSH access from WAN.
 			# + (mkForward external 22143 config.container.host 22143 tcp)
+			;
 		};
 	};
 }
diff --git a/lib/Container.nix b/lib/Container.nix
index 1389279..bfb0436 100644
--- a/lib/Container.nix
+++ b/lib/Container.nix
@@ -2,7 +2,6 @@
 	config,
 	const,
 	lib,
-	pkgs,
 	util,
 	...
 }: {
@@ -28,13 +27,15 @@
 	mkContainerConfig = cfg: extra: lib.recursiveUpdate {
 		boot.isContainer = true;
 
-		# HACK: Do not evaluate nixpkgs inside the container. Use host's instead.
-		# nixpkgs.pkgs = lib.mkForce pkgs;
-		nixpkgs.pkgs = lib.mkForce pkgs;
-
 		# Release version.
 		system.stateVersion = const.stateVersion;
 
+		# Nix is fucking annoying.
+		nixpkgs.config = {
+			allowUnfree = true;
+			allowInsecurePredicate = x: true;
+		};
+
 		# Allow passwordless login as root.
 		users = {
 			users.root.password = "";