diff --git a/pkgs/development/python-modules/et_xmlfile/default.nix b/pkgs/development/python-modules/et-xmlfile/default.nix
similarity index 100%
rename from pkgs/development/python-modules/et_xmlfile/default.nix
rename to pkgs/development/python-modules/et-xmlfile/default.nix
diff --git a/pkgs/development/python-modules/openpyxl/default.nix b/pkgs/development/python-modules/openpyxl/default.nix
index 03a33ef26a6b..799c991e40fe 100644
--- a/pkgs/development/python-modules/openpyxl/default.nix
+++ b/pkgs/development/python-modules/openpyxl/default.nix
@@ -1,6 +1,6 @@
 { lib
 , buildPythonPackage
-, et_xmlfile
+, et-xmlfile
 , fetchFromGitLab
 , jdcal
 , lxml
@@ -26,7 +26,7 @@ buildPythonPackage rec {
 
   propagatedBuildInputs = [
     jdcal
-    et_xmlfile
+    et-xmlfile
     lxml
   ];
 
diff --git a/pkgs/top-level/python-aliases.nix b/pkgs/top-level/python-aliases.nix
index 6c529b52e1ac..b067bf9264da 100644
--- a/pkgs/top-level/python-aliases.nix
+++ b/pkgs/top-level/python-aliases.nix
@@ -128,6 +128,7 @@ mapAliases ({
   eebrightbox = throw "eebrightbox is unmaintained upstream and has therefore been removed"; # added 2022-02-03
   EasyProcess = easyprocess; # added 2023-02-19
   email_validator = email-validator; # added 2022-06-22
+  et_xmlfile = et-xmlfile; # added 2023-10-16
   ev3dev2 = python-ev3dev2; # added 2023-06-19
   Fabric = fabric; # addedd 2023-02-19
   face_recognition = face-recognition; # added 2022-10-15
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index dfd31b4e57dd..1c0291f2b073 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -3616,7 +3616,7 @@ self: super: with self; {
 
   etuples = callPackage ../development/python-modules/etuples { };
 
-  et_xmlfile = callPackage ../development/python-modules/et_xmlfile { };
+  et-xmlfile = callPackage ../development/python-modules/et-xmlfile { };
 
   eufylife-ble-client = callPackage ../development/python-modules/eufylife-ble-client { };