diff --git a/pkgs/development/tools/database/sqlfluff/default.nix b/pkgs/development/tools/database/sqlfluff/default.nix
index 6578bf8bf71..975254b83d7 100644
--- a/pkgs/development/tools/database/sqlfluff/default.nix
+++ b/pkgs/development/tools/database/sqlfluff/default.nix
@@ -21,7 +21,7 @@ python3.pkgs.buildPythonApplication rec {
     click
     colorama
     configparser
-    diff_cover
+    diff-cover
     jinja2
     oyaml
     pathspec