diff --git a/overrides.nix b/overrides.nix
index 9b54619..2106708 100644
--- a/overrides.nix
+++ b/overrides.nix
@@ -369,9 +369,13 @@ self: super:
     }
   );
 
-  # disable the removal of pyproject.toml, required because of setuptools_scm
   jaraco-functools = super.jaraco-functools.overridePythonAttrs (
     old: {
+      # required for the extra "toml" dependency in setuptools_scm[toml]
+      buildInputs = (old.buildInputs or [ ]) ++ [
+        self.toml
+      ];
+      # disable the removal of pyproject.toml, required because of setuptools_scm
       dontPreferSetupPy = true;
     }
   );
@@ -764,9 +768,13 @@ self: super:
     '';
   });
 
-  # disable the removal of pyproject.toml, required because of setuptools_scm
   portend = super.portend.overridePythonAttrs (
     old: {
+      # required for the extra "toml" dependency in setuptools_scm[toml]
+      buildInputs = (old.buildInputs or [ ]) ++ [
+        self.toml
+      ];
+      # disable the removal of pyproject.toml, required because of setuptools_scm
       dontPreferSetupPy = true;
     }
   );
@@ -1278,9 +1286,13 @@ self: super:
     }
   );
 
-  # disable the removal of pyproject.toml, required because of setuptools_scm
   tempora = super.tempora.overridePythonAttrs (
     old: {
+      # required for the extra "toml" dependency in setuptools_scm[toml]
+      buildInputs = (old.buildInputs or [ ]) ++ [
+        self.toml
+      ];
+      # disable the removal of pyproject.toml, required because of setuptools_scm
       dontPreferSetupPy = true;
     }
   );