diff --git a/pkgs/development/python-modules/vega/default.nix b/pkgs/development/python-modules/vega/default.nix
index b071612562aa8..556d06d7d3935 100644
--- a/pkgs/development/python-modules/vega/default.nix
+++ b/pkgs/development/python-modules/vega/default.nix
@@ -1,5 +1,6 @@
 { lib
 , buildPythonPackage
+, fetchpatch
 , fetchPypi
 , pythonOlder
 , pythonRelaxDepsHook
@@ -26,10 +27,14 @@ buildPythonPackage rec {
     hash = "sha256-v1/8taHdN1n9+gy7L+g/wAJ2x9FwYCaxZiEdFqLct1Y=";
   };
 
-  postPatch = ''
-    substituteInPlace pyproject.toml \
-      --replace "poetry.masonry.api" "poetry.core.masonry.api"
-  '';
+  patches = [
+    # https://github.com/vega/ipyvega/pull/507
+    (fetchpatch {
+      name = "replace-poetry-with-poetry-core.patch";
+      url = "https://github.com/vega/ipyvega/commit/1a5028ee5d54e24b9650b66685f54c42b72c7899.patch";
+      hash = "sha256-W8UmMit7DJGKCM9+/OSRLTuRvC0ZR42AP/b/frVEvsk=";
+    })
+  ];
 
   nativeBuildInputs = [
     poetry-core