diff --git a/pkgs/by-name/pa/paperless-ngx/package.nix b/pkgs/by-name/pa/paperless-ngx/package.nix
index 41445394d5b8..d05b49ca16e2 100644
--- a/pkgs/by-name/pa/paperless-ngx/package.nix
+++ b/pkgs/by-name/pa/paperless-ngx/package.nix
@@ -313,7 +313,7 @@ python.pkgs.buildPythonApplication rec {
       tesseract5
       ;
     nltkData = with nltk-data; [
-      punkt_tab
+      punkt-tab
       snowball_data
       stopwords
     ];
diff --git a/pkgs/development/python-modules/aider-chat/default.nix b/pkgs/development/python-modules/aider-chat/default.nix
index 4aa6ae731311..bc4534b8da61 100644
--- a/pkgs/development/python-modules/aider-chat/default.nix
+++ b/pkgs/development/python-modules/aider-chat/default.nix
@@ -125,7 +125,7 @@ let
   aider-nltk-data = symlinkJoin {
     name = "aider-nltk-data";
     paths = [
-      nltk-data.punkt_tab
+      nltk-data.punkt-tab
       nltk-data.stopwords
     ];
   };
diff --git a/pkgs/development/python-modules/type-infer/default.nix b/pkgs/development/python-modules/type-infer/default.nix
index 4ce88d3b049f..4b8ef9e99d5e 100644
--- a/pkgs/development/python-modules/type-infer/default.nix
+++ b/pkgs/development/python-modules/type-infer/default.nix
@@ -24,7 +24,7 @@ let
     name = "nltk-test-data";
     paths = [
       nltk-data.punkt
-      nltk-data.punkt_tab
+      nltk-data.punkt-tab
       nltk-data.stopwords
     ];
   };
diff --git a/pkgs/tools/text/nltk-data/default.nix b/pkgs/tools/text/nltk-data/default.nix
index b3e66f7fe4a7..e2256c75d087 100644
--- a/pkgs/tools/text/nltk-data/default.nix
+++ b/pkgs/tools/text/nltk-data/default.nix
@@ -61,7 +61,7 @@ lib.makeScope newScope (self: {
     location = "tokenizers";
     hash = "sha256-OzMkruoYbFKqzuimOXIpE5lhHz8tmSqOFoLT+fjdTVg=";
   };
-  punkt_tab = makeNltkDataPackage {
+  punkt-tab = makeNltkDataPackage {
     pname = "punkt_tab";
     location = "tokenizers";
     hash = "sha256-OzMkruoYbFKqzuimOXIpE5lhHz8tmSqOFoLT+fjdTVg=";