diff --git a/pkgs/development/python-modules/clr-loader/default.nix b/pkgs/development/python-modules/clr-loader/default.nix
index 2c74dc30d1c5..d642084a2bf0 100644
--- a/pkgs/development/python-modules/clr-loader/default.nix
+++ b/pkgs/development/python-modules/clr-loader/default.nix
@@ -9,10 +9,11 @@
 }:
 
 let
-  pname = "clr_loader";
+  pname = "clr-loader";
   version = "0.2.5";
   src = fetchPypi {
-    inherit pname version;
+    pname = "clr_loader";
+    inherit version;
     sha256 = "sha256-gu1ftlRynRT9iCludLtrhOss+5dv9LfUnU5En9eKIms=";
   };