diff --git a/pkgs/development/python-modules/constantly/default.nix b/pkgs/development/python-modules/constantly/default.nix
new file mode 100644
index 000000000000..44fbeb6d39f5
--- /dev/null
+++ b/pkgs/development/python-modules/constantly/default.nix
@@ -0,0 +1,18 @@
+{ stdenv, buildPythonPackage, fetchurl
+}:
+buildPythonPackage rec {
+  name = "constantly-${version}";
+  version = "15.1.0";
+
+  src = fetchurl {
+    url = "mirror://pypi/c/constantly/${name}.tar.gz";
+    sha256 = "0dgwdla5kfpqz83hfril716inm41hgn9skxskvi77605jbmp4qsq";
+  };
+
+  meta = with stdenv.lib; {
+    homepage = https://github.com/twisted/constantly;
+    description = "symbolic constant support";
+    license = licenses.mit;
+    maintainers = [ ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 2963d99d0b63..f90d2f2d9332 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2560,6 +2560,8 @@ in {
     };
   };
 
+  constantly = callPackage ../development/python-modules/constantly { };
+
   cornice = buildPythonPackage rec {
     name = "cornice-${version}";
     version = "1.2.1";