diff --git a/pkgs/development/python-modules/qcelemental/default.nix b/pkgs/development/python-modules/qcelemental/default.nix
index 7b12781ba160..191edbba7eba 100644
--- a/pkgs/development/python-modules/qcelemental/default.nix
+++ b/pkgs/development/python-modules/qcelemental/default.nix
@@ -2,6 +2,7 @@
 , buildPythonPackage
 , lib
 , fetchPypi
+, poetry-core
 , networkx
 , numpy
 , pint
@@ -12,16 +13,20 @@
 
 buildPythonPackage rec {
   pname = "qcelemental";
-  version = "0.25.1";
-  format = "setuptools";
+  version = "0.26.0";
+  format = "pyproject";
 
   disabled = pythonOlder "3.7";
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-4+DlP+BH0UdWcYRBBApdc3E18L2zPvsdY6GTW5WCGnQ=";
+    hash = "sha256-oU6FEM2/2mRe8UYcGv0C77WZMRcz27pfg/zR1haKbd0=";
   };
 
+  nativeBuildInputs = [
+    poetry-core
+  ];
+
   propagatedBuildInputs = [
     networkx
     numpy