diff --git a/pkgs/development/python-modules/poetry/default.nix b/pkgs/development/python-modules/poetry/default.nix
index 52be2c3bafc..d31fe236f82 100644
--- a/pkgs/development/python-modules/poetry/default.nix
+++ b/pkgs/development/python-modules/poetry/default.nix
@@ -17,10 +17,11 @@
 , virtualenv
 , functools32
 , pytest
+, jsonschema
 }:
 
 let
-  cleo6 = cleo.overrideAttrs (oldAttrs: rec {
+  cleo6 = cleo.overridePythonAttrs (oldAttrs: rec {
     version = "0.6.8";
     src = fetchPypi {
       inherit (oldAttrs) pname;
@@ -28,8 +29,6 @@ let
       sha256 = "06zp695hq835rkaq6irr1ds1dp2qfzyf32v60vxpd8rcnxv319l5";
     };
   });
-
-  jsonschema3 = callPackage ./jsonschema.nix { };
   glob2 = callPackage ./glob2.nix { };
 
 in buildPythonPackage rec {
@@ -51,11 +50,12 @@ in buildPythonPackage rec {
   format = "pyproject";
 
   propagatedBuildInputs = [
+    cachy
     cleo6
     requests
     cachy
     requests-toolbelt
-    jsonschema3
+    jsonschema
     pyrsistent
     pyparsing
     cachecontrol
diff --git a/pkgs/development/python-modules/poetry/jsonschema.nix b/pkgs/development/python-modules/poetry/jsonschema.nix
deleted file mode 100644
index f85477d04fa..00000000000
--- a/pkgs/development/python-modules/poetry/jsonschema.nix
+++ /dev/null
@@ -1,37 +0,0 @@
-{ lib, buildPythonPackage, fetchPypi, isPy27
-, attrs
-, pyrsistent
-, six
-, functools32
-, lockfile
-, setuptools_scm
-}:
-
-buildPythonPackage rec {
-  pname = "jsonschema";
-  version = "3.0.2";
-
-  src = fetchPypi {
-    inherit pname version;
-    sha256 = "8d4a2b7b6c2237e0199c8ea1a6d3e05bf118e289ae2b9d7ba444182a2959560d";
-  };
-
-  nativeBuildInputs = [ setuptools_scm ];
-  propagatedBuildInputs = [
-    attrs
-    pyrsistent
-    six
-    lockfile
-  ] ++ lib.optional isPy27 functools32;
-
-  # tests for latest version rely on custom version of betterpaths that is
-  # difficult to deal with and isn't used on master
-  doCheck = false;
-
-  meta = with lib; {
-    homepage = https://github.com/Julian/jsonschema;
-    description = "An implementation of JSON Schema validation for Python";
-    license = licenses.mit;
-    maintainers = with maintainers; [ jakewaksbaum ];
-  };
-}