diff --git a/checks/mumble/default.nix b/checks/mumble/default.nix
index 912943270..081b5ea75 100644
--- a/checks/mumble/default.nix
+++ b/checks/mumble/default.nix
@@ -1,143 +1,102 @@
-(import ../lib/test-base.nix) (
-  { ... }:
-  let
-    common =
-      { self, pkgs, ... }:
-      {
-        imports = [
-          self.clanModules.mumble
-          {
-            clan.services.mumble.user = "alice";
-          }
-          self.nixosModules.clanCore
-          (self.inputs.nixpkgs + "/nixos/tests/common/x11.nix")
-          {
-            clan.core.settings.directory = ./.;
-            environment.systemPackages = [ pkgs.killall ];
-            clan.core.facts.services.mumble.secret."mumble-key".path = "/etc/mumble-key";
-            clan.core.facts.services.mumble.public."mumble-cert".path = "/etc/mumble-cert";
-          }
-        ];
+{
+  pkgs,
+  self,
+  clanLib,
+  ...
+}:
+clanLib.test.makeTestClan {
+  inherit pkgs self;
+  nixosTest = (
+    { lib, ... }:
+    let
+      common =
+        { pkgs, modulesPath, ... }:
+        {
+          imports = [
+            (modulesPath + "/../tests/common/x11.nix")
+          ];
 
+          clan.services.mumble.user = "alice";
+          environment.systemPackages = [ pkgs.killall ];
+        };
+      machines = [
+        "peer1"
+        "peer2"
+      ];
+    in
+    {
+      name = "mumble";
+
+      clan = {
+        directory = ./.;
+        inventory = {
+          machines = lib.genAttrs machines (_: { });
+          services = {
+            mumble.default = {
+              roles.server.machines = machines;
+            };
+          };
+        };
       };
-  in
-  {
-    name = "mumble";
 
-    enableOCR = true;
+      enableOCR = true;
 
-    nodes.peer1 =
-      { ... }:
-      {
-        imports = [
-          common
-          {
-            environment.etc = {
-              "mumble-key".source = ./peer_1/peer_1_test_key;
-              "mumble-cert".source = ./peer_1/peer_1_test_cert;
-            };
-            systemd.tmpfiles.settings."vmsecrets" = {
-              "/var/lib/murmur/sslKey" = {
-                C.argument = "${./peer_1/peer_1_test_key}";
-                z = {
-                  mode = "0400";
-                  user = "murmur";
-                };
-              };
-              "/var/lib/murmur/sslCert" = {
-                C.argument = "${./peer_1/peer_1_test_cert}";
-                z = {
-                  mode = "0400";
-                  user = "murmur";
-                };
-              };
-            };
-            clan.core.facts.services.mumble.secret."mumble-key".path = "/etc/mumble-key";
-            clan.core.facts.services.mumble.public."mumble-cert".path = "/etc/mumble-cert";
-          }
-        ];
-      };
-    nodes.peer2 =
-      { ... }:
-      {
-        imports = [
-          common
-          {
-            environment.etc = {
-              "mumble-key".source = ./peer_2/peer_2_test_key;
-              "mumble-cert".source = ./peer_2/peer_2_test_cert;
-            };
-            systemd.tmpfiles.settings."vmsecrets" = {
-              "/var/lib/murmur/sslKey" = {
-                C.argument = "${./peer_2/peer_2_test_key}";
-                z = {
-                  mode = "0400";
-                  user = "murmur";
-                };
-              };
-              "/var/lib/murmur/sslCert" = {
-                C.argument = "${./peer_2/peer_2_test_cert}";
-                z = {
-                  mode = "0400";
-                  user = "murmur";
-                };
-              };
-            };
-          }
-        ];
-      };
-    testScript = ''
-      start_all()
+      nodes.peer1 = common;
+      nodes.peer2 = common;
 
-      with subtest("Waiting for x"):
-        peer1.wait_for_x()
-        peer2.wait_for_x()
+      testScript = ''
+        start_all()
 
-      with subtest("Waiting for murmur"):
-        peer1.wait_for_unit("murmur.service")
-        peer2.wait_for_unit("murmur.service")
+        with subtest("Waiting for x"):
+          peer1.wait_for_x()
+          peer2.wait_for_x()
 
-      with subtest("Starting Mumble"):
-        # starting mumble is blocking
-        peer1.execute("mumble >&2 &")
-        peer2.execute("mumble >&2 &")
+        with subtest("Waiting for murmur"):
+          peer1.wait_for_unit("murmur.service")
+          peer2.wait_for_unit("murmur.service")
 
-      with subtest("Wait for Mumble"):
-        peer1.wait_for_window(r"^Mumble$")
-        peer2.wait_for_window(r"^Mumble$")
+        with subtest("Starting Mumble"):
+          # starting mumble is blocking
+          peer1.execute("mumble >&2 &")
+          peer2.execute("mumble >&2 &")
 
-      with subtest("Wait for certificate creation"):
-        peer1.wait_for_window(r"^Mumble$")
-        peer1.sleep(3) # mumble is slow to register handlers
-        peer1.send_chars("\n")
-        peer1.send_chars("\n")
-        peer2.wait_for_window(r"^Mumble$")
-        peer2.sleep(3) # mumble is slow to register handlers
-        peer2.send_chars("\n")
-        peer2.send_chars("\n")
+        with subtest("Wait for Mumble"):
+          peer1.wait_for_window(r"^Mumble$")
+          peer2.wait_for_window(r"^Mumble$")
 
-      with subtest("Wait for server connect"):
-        peer1.wait_for_window(r"^Mumble Server Connect$")
-        peer2.wait_for_window(r"^Mumble Server Connect$")
+        with subtest("Wait for certificate creation"):
+          peer1.wait_for_window(r"^Mumble$")
+          peer1.sleep(3) # mumble is slow to register handlers
+          peer1.send_chars("\n")
+          peer1.send_chars("\n")
+          peer2.wait_for_window(r"^Mumble$")
+          peer2.sleep(3) # mumble is slow to register handlers
+          peer2.send_chars("\n")
+          peer2.send_chars("\n")
 
-      with subtest("Check validity of server certificates"):
-        peer1.execute("killall .mumble-wrapped")
-        peer1.sleep(1)
-        peer1.execute("mumble mumble://peer2 >&2 &")
-        peer1.wait_for_window(r"^Mumble$")
-        peer1.sleep(3) # mumble is slow to register handlers
-        peer1.send_chars("\n")
-        peer1.send_chars("\n")
-        peer1.wait_for_text("Connected.")
+        with subtest("Wait for server connect"):
+          peer1.wait_for_window(r"^Mumble Server Connect$")
+          peer2.wait_for_window(r"^Mumble Server Connect$")
 
-        peer2.execute("killall .mumble-wrapped")
-        peer2.sleep(1)
-        peer2.execute("mumble mumble://peer1 >&2 &")
-        peer2.wait_for_window(r"^Mumble$")
-        peer2.sleep(3) # mumble is slow to register handlers
-        peer2.send_chars("\n")
-        peer2.send_chars("\n")
-        peer2.wait_for_text("Connected.")
-    '';
-  }
-)
+        with subtest("Check validity of server certificates"):
+          peer1.execute("killall .mumble-wrapped")
+          peer1.sleep(1)
+          peer1.execute("mumble mumble://peer2 >&2 &")
+          peer1.wait_for_window(r"^Mumble$")
+          peer1.sleep(3) # mumble is slow to register handlers
+          peer1.send_chars("\n")
+          peer1.send_chars("\n")
+          peer1.wait_for_text("Connected.")
+
+          peer2.execute("killall .mumble-wrapped")
+          peer2.sleep(1)
+          peer2.execute("mumble mumble://peer1 >&2 &")
+          peer2.wait_for_window(r"^Mumble$")
+          peer2.sleep(3) # mumble is slow to register handlers
+          peer2.send_chars("\n")
+          peer2.send_chars("\n")
+          peer2.wait_for_text("Connected.")
+      '';
+    }
+  );
+}
diff --git a/clanModules/mumble/README.md b/clanModules/mumble/README.md
index 552a9e2d1..a33b99714 100644
--- a/clanModules/mumble/README.md
+++ b/clanModules/mumble/README.md
@@ -1,7 +1,12 @@
 ---
 description = "Open Source, Low Latency, High Quality Voice Chat."
 categories = ["Audio", "Social"]
+features = [ "inventory" ]
+
+[constraints]
+roles.server.min = 1
 ---
+
 The mumble clan module gives you:
 
 - True low latency voice communication.
diff --git a/clanModules/mumble/default.nix b/clanModules/mumble/default.nix
index 2cca556ad..ab24e1e49 100644
--- a/clanModules/mumble/default.nix
+++ b/clanModules/mumble/default.nix
@@ -1,122 +1,6 @@
+# Dont import this file
+# It is only here for backwards compatibility.
+# Dont author new modules with this file.
 {
-  lib,
-  config,
-  pkgs,
-  ...
-}:
-let
-  dir = config.clan.core.settings.directory;
-  machineDir = dir + "/vars/per-machine";
-  machinesFileSet = builtins.readDir machineDir;
-  machines = lib.mapAttrsToList (name: _: name) machinesFileSet;
-  machineJson = builtins.toJSON machines;
-  certificateMachinePath = machines: machineDir + "/${machines}" + "/mumble/mumble-cert/value";
-  certificatesUnchecked = builtins.map (
-    machine:
-    let
-      fullPath = certificateMachinePath machine;
-    in
-    if builtins.pathExists fullPath then machine else null
-  ) machines;
-  certificate = lib.filter (machine: machine != null) certificatesUnchecked;
-  machineCert = builtins.map (
-    machine: (lib.nameValuePair machine (builtins.readFile (certificateMachinePath machine)))
-  ) certificate;
-  machineCertJson = builtins.toJSON machineCert;
-
-in
-{
-  options.clan.services.mumble = {
-    user = lib.mkOption {
-      type = lib.types.nullOr lib.types.str;
-      default = null;
-      example = "alice";
-      description = "The user mumble should be set up for.";
-    };
-  };
-
-  config = {
-    services.murmur = {
-      enable = true;
-      logDays = -1;
-      registerName = config.clan.core.settings.machine.name;
-      openFirewall = true;
-      bonjour = true;
-      sslKey = "/var/lib/murmur/sslKey";
-      sslCert = "/var/lib/murmur/sslCert";
-    };
-
-    clan.core.state.mumble.folders = [
-      "/var/lib/mumble"
-      "/var/lib/murmur"
-    ];
-
-    systemd.tmpfiles.rules = [
-      "d '/var/lib/mumble' 0770 '${config.clan.services.mumble.user}' 'users' - -"
-    ];
-
-    systemd.tmpfiles.settings."murmur" = {
-      "/var/lib/murmur/sslKey" = {
-        C.argument = config.clan.core.vars.generators.mumble.files.mumble-key.path;
-        Z = {
-          mode = "0400";
-          user = "murmur";
-        };
-      };
-      "/var/lib/murmur/sslCert" = {
-        C.argument = config.clan.core.vars.generators.mumble.files.mumble-cert.path;
-        Z = {
-          mode = "0400";
-          user = "murmur";
-        };
-      };
-    };
-
-    environment.systemPackages =
-      let
-        mumbleCfgDir = "/var/lib/mumble";
-        mumbleDatabasePath = "${mumbleCfgDir}/mumble.sqlite";
-        mumbleCfgPath = "/var/lib/mumble/mumble_settings.json";
-        populate-channels = pkgs.writers.writePython3 "mumble-populate-channels" {
-          libraries = [
-            pkgs.python3Packages.cryptography
-            pkgs.python3Packages.pyopenssl
-          ];
-          flakeIgnore = [
-            # We don't live in the dark ages anymore.
-            # Languages like Python that are whitespace heavy will overrun
-            # 79 characters..
-            "E501"
-          ];
-        } (builtins.readFile ./mumble-populate-channels.py);
-        mumble = pkgs.writeShellScriptBin "mumble" ''
-          set -xeu
-          mkdir -p ${mumbleCfgDir}
-          pushd "${mumbleCfgDir}"
-          XDG_DATA_HOME=${mumbleCfgDir}
-          XDG_DATA_DIR=${mumbleCfgDir}
-          ${populate-channels} --ensure-config '${mumbleCfgPath}' --db-location ${mumbleDatabasePath}
-          ${populate-channels} --machines '${machineJson}' --username ${config.clan.core.settings.machine.name} --db-location ${mumbleDatabasePath}
-          ${populate-channels} --servers '${machineCertJson}' --username ${config.clan.core.settings.machine.name} --db-location ${mumbleDatabasePath} --cert True
-          ${pkgs.mumble}/bin/mumble --config ${mumbleCfgPath} "$@"
-          popd
-        '';
-      in
-      [ mumble ];
-
-    clan.core.vars.generators.mumble = {
-      migrateFact = "mumble";
-      files.mumble-key = { };
-      files.mumble-cert.secret = false;
-      runtimeInputs = [
-        pkgs.coreutils
-        pkgs.openssl
-      ];
-      script = ''
-        openssl genrsa -out "$out/mumble-key" 2048
-        openssl req -new -x509 -key "$out/mumble-key" -out "$out/mumble-cert"
-      '';
-    };
-  };
-
+  imports = [ ./roles/server.nix ];
 }
diff --git a/clanModules/mumble/mumble-populate-channels.py b/clanModules/mumble/roles/mumble-populate-channels.py
similarity index 100%
rename from clanModules/mumble/mumble-populate-channels.py
rename to clanModules/mumble/roles/mumble-populate-channels.py
diff --git a/clanModules/mumble/roles/server.nix b/clanModules/mumble/roles/server.nix
new file mode 100644
index 000000000..479a502b3
--- /dev/null
+++ b/clanModules/mumble/roles/server.nix
@@ -0,0 +1,123 @@
+{
+  lib,
+  config,
+  pkgs,
+  ...
+}:
+let
+  dir = config.clan.core.settings.directory;
+  # TODO: this should actually use the inventory to figure out which machines to use.
+  machineDir = dir + "/vars/per-machine";
+  machinesFileSet = builtins.readDir machineDir;
+  machines = lib.mapAttrsToList (name: _: name) machinesFileSet;
+  machineJson = builtins.toJSON machines;
+  certificateMachinePath = machines: machineDir + "/${machines}" + "/mumble/mumble-cert/value";
+  certificatesUnchecked = builtins.map (
+    machine:
+    let
+      fullPath = certificateMachinePath machine;
+    in
+    if builtins.pathExists fullPath then machine else null
+  ) machines;
+  certificate = lib.filter (machine: machine != null) certificatesUnchecked;
+  machineCert = builtins.map (
+    machine: (lib.nameValuePair machine (builtins.readFile (certificateMachinePath machine)))
+  ) certificate;
+  machineCertJson = builtins.toJSON machineCert;
+
+in
+{
+  options.clan.services.mumble = {
+    user = lib.mkOption {
+      type = lib.types.nullOr lib.types.str;
+      default = null;
+      example = "alice";
+      description = "The user mumble should be set up for.";
+    };
+  };
+
+  config = {
+    services.murmur = {
+      enable = true;
+      logDays = -1;
+      registerName = config.clan.core.settings.machine.name;
+      openFirewall = true;
+      bonjour = true;
+      sslKey = "/var/lib/murmur/sslKey";
+      sslCert = "/var/lib/murmur/sslCert";
+    };
+
+    clan.core.state.mumble.folders = [
+      "/var/lib/mumble"
+      "/var/lib/murmur"
+    ];
+
+    systemd.tmpfiles.rules = [
+      "d '/var/lib/mumble' 0770 '${config.clan.services.mumble.user}' 'users' - -"
+    ];
+
+    systemd.tmpfiles.settings."murmur" = {
+      "/var/lib/murmur/sslKey" = {
+        C.argument = config.clan.core.vars.generators.mumble.files.mumble-key.path;
+        Z = {
+          mode = "0400";
+          user = "murmur";
+        };
+      };
+      "/var/lib/murmur/sslCert" = {
+        C.argument = config.clan.core.vars.generators.mumble.files.mumble-cert.path;
+        Z = {
+          mode = "0400";
+          user = "murmur";
+        };
+      };
+    };
+
+    environment.systemPackages =
+      let
+        mumbleCfgDir = "/var/lib/mumble";
+        mumbleDatabasePath = "${mumbleCfgDir}/mumble.sqlite";
+        mumbleCfgPath = "/var/lib/mumble/mumble_settings.json";
+        populate-channels = pkgs.writers.writePython3 "mumble-populate-channels" {
+          libraries = [
+            pkgs.python3Packages.cryptography
+            pkgs.python3Packages.pyopenssl
+          ];
+          flakeIgnore = [
+            # We don't live in the dark ages anymore.
+            # Languages like Python that are whitespace heavy will overrun
+            # 79 characters..
+            "E501"
+          ];
+        } (builtins.readFile ./mumble-populate-channels.py);
+        mumble = pkgs.writeShellScriptBin "mumble" ''
+          set -xeu
+          mkdir -p ${mumbleCfgDir}
+          pushd "${mumbleCfgDir}"
+          XDG_DATA_HOME=${mumbleCfgDir}
+          XDG_DATA_DIR=${mumbleCfgDir}
+          ${populate-channels} --ensure-config '${mumbleCfgPath}' --db-location ${mumbleDatabasePath}
+          ${populate-channels} --machines '${machineJson}' --username ${config.clan.core.settings.machine.name} --db-location ${mumbleDatabasePath}
+          ${populate-channels} --servers '${machineCertJson}' --username ${config.clan.core.settings.machine.name} --db-location ${mumbleDatabasePath} --cert True
+          ${pkgs.mumble}/bin/mumble --config ${mumbleCfgPath} "$@"
+          popd
+        '';
+      in
+      [ mumble ];
+
+    clan.core.vars.generators.mumble = {
+      migrateFact = "mumble";
+      files.mumble-key = { };
+      files.mumble-cert.secret = false;
+      runtimeInputs = [
+        pkgs.coreutils
+        pkgs.openssl
+      ];
+      script = ''
+        openssl genrsa -out "$out/mumble-key" 2048
+        openssl req -new -x509 -key "$out/mumble-key" -out "$out/mumble-cert"
+      '';
+    };
+  };
+
+}