diff --git a/pkgs/development/python-modules/bash_kernel/default.nix b/pkgs/development/python-modules/bash_kernel/default.nix
index b7ccfedfbb8..582e7c5dccf 100644
--- a/pkgs/development/python-modules/bash_kernel/default.nix
+++ b/pkgs/development/python-modules/bash_kernel/default.nix
@@ -2,6 +2,7 @@
 , buildPythonPackage
 , fetchPypi
 , fetchpatch
+, flit-core
 , ipykernel
 , isPy27
 , python
@@ -12,7 +13,7 @@
 buildPythonPackage rec {
   pname = "bash_kernel";
   version = "0.9.0";
-  format = "flit";
+  format = "pyproject";
   disabled = isPy27;
 
   src = fetchPypi {
@@ -33,6 +34,8 @@ buildPythonPackage rec {
       --replace "\"bash\"" "'${bash}/bin/bash'"
   '';
 
+  nativeBuildInputs = [ flit-core ];
+
   propagatedBuildInputs = [ ipykernel pexpect ];
 
   # no tests