diff --git a/pkgs/by-name/aw/awscli2/package.nix b/pkgs/by-name/aw/awscli2/package.nix
index d5b0118bf66b..6a4df356ef15 100644
--- a/pkgs/by-name/aw/awscli2/package.nix
+++ b/pkgs/by-name/aw/awscli2/package.nix
@@ -74,6 +74,7 @@ py.pkgs.buildPythonApplication rec {
 
   postPatch = ''
     substituteInPlace pyproject.toml \
+      --replace-fail 'flit_core>=3.7.1,<3.9.1' 'flit_core>=3.7.1' \
       --replace-fail 'awscrt>=0.19.18,<=0.22.0' 'awscrt>=0.22.0' \
       --replace-fail 'cryptography>=40.0.0,<43.0.2' 'cryptography>=43.0.0' \
       --replace-fail 'distro>=1.5.0,<1.9.0' 'distro>=1.5.0' \