diff --git a/maintainers/maintainer-list.nix b/maintainers/maintainer-list.nix
index 33837ea1b32..d9a8d931590 100644
--- a/maintainers/maintainer-list.nix
+++ b/maintainers/maintainer-list.nix
@@ -5903,6 +5903,12 @@
       fingerprint = "ADF4 C13D 0E36 1240 BD01  9B51 D1DE 6D7F 6936 63A5";
     }];
   };
+  simonchatts = {
+    email = "code@chatts.net";
+    github = "simonchatts";
+    githubId = 11135311;
+    name = "Simon Chatterjee";
+  };
   simonvandel = {
     email = "simon.vandel@gmail.com";
     github = "simonvandel";
diff --git a/pkgs/development/python-modules/entrance/default.nix b/pkgs/development/python-modules/entrance/default.nix
new file mode 100644
index 00000000000..67005d577cd
--- /dev/null
+++ b/pkgs/development/python-modules/entrance/default.nix
@@ -0,0 +1,45 @@
+{ lib, fetchPypi, buildPythonPackage, pythonOlder, routerFeatures
+, janus, ncclient, paramiko, pyyaml, sanic }:
+
+let
+  # The `routerFeatures` flag optionally brings in some somewhat heavy
+  # dependencies, in order to enable interacting with routers
+  opts = if routerFeatures then {
+      prePatch = ''
+        substituteInPlace ./setup.py --replace "extra_deps = []" "extra_deps = router_feature_deps"
+      '';
+      extraBuildInputs = [ janus ncclient paramiko ];
+    } else {
+      prePatch = "";
+      extraBuildInputs = [];
+    };
+
+in
+
+buildPythonPackage rec {
+  pname = "entrance";
+  version = "1.1.10";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "080qkvkmfw4004cl721l5bvpg001xz8vs6q59dg797kqxfrwk5kw";
+  };
+
+  # The versions of `sanic` and `websockets` in nixpkgs only support 3.6 or later
+  disabled = pythonOlder "3.6";
+
+  # No useful tests
+  doCheck = false;
+
+  propagatedBuildInputs = [ pyyaml sanic ] ++ opts.extraBuildInputs;
+
+  prePatch = opts.prePatch;
+
+  meta = with lib; {
+    description = "A server framework for web apps with an Elm frontend";
+    homepage = https://github.com/ensoft/entrance;
+    license = licenses.mit;
+    maintainers = with maintainers; [ simonchatts ];
+  };
+}
+
diff --git a/pkgs/development/python-modules/janus/default.nix b/pkgs/development/python-modules/janus/default.nix
new file mode 100644
index 00000000000..da0f43811f2
--- /dev/null
+++ b/pkgs/development/python-modules/janus/default.nix
@@ -0,0 +1,22 @@
+{ lib, buildPythonPackage, fetchPypi, pytest, pythonOlder }:
+
+buildPythonPackage rec {
+  pname = "janus";
+  version = "0.4.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "cfc221683160b91b35bae1917e2957b78dad10a2e634f4f8ed119ed72e2a88ef";
+  };
+
+  disabled = pythonOlder "3.6";
+
+  checkInputs = [ pytest ];
+
+  meta = with lib; {
+    description = "Mixed sync-async queue";
+    homepage = "https://github.com/aio-libs/janus";
+    license = licenses.asl20;
+    maintainers = [ maintainers.simonchatts ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index a610ef51d8c..4a19c606036 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -563,6 +563,10 @@ in {
 
   diff-match-patch = callPackage ../development/python-modules/diff-match-patch { };
 
+  entrance = callPackage ../development/python-modules/entrance { routerFeatures = false; };
+
+  entrance-with-router-features = callPackage ../development/python-modules/entrance { routerFeatures = true; };
+
   eradicate = callPackage ../development/python-modules/eradicate {  };
 
   face = callPackage ../development/python-modules/face { };
@@ -689,6 +693,8 @@ in {
 
   inquirer = callPackage ../development/python-modules/inquirer { };
 
+  janus = callPackage ../development/python-modules/janus { };
+
   jira = callPackage ../development/python-modules/jira { };
 
   jwcrypto = callPackage ../development/python-modules/jwcrypto { };