From 2047417be9a9e30398893528c1ee0a5dc568e3d1 Mon Sep 17 00:00:00 2001
From: "Alexis (Poliorcetics) Bourget" <ab_contribs@poliorcetiq.eu>
Date: Thu, 10 Sep 2026 17:11:44 +0200
Subject: [PATCH] datamodel-code-generator: fix `mainProgram`

Currently running `nix run nixpkgs#datamodel-code-generator -- --help`
produces an error:

```
error: unable to execute '/nix/store/v99ll0sn384sv52fy4mhxdyqic6438hk-python3.13-datamodel-code-generator-0.71.0/bin/datamodel-code-generator': No such file or directory
```

because of:

```bash
$ nix build nixpkgs#datamodel-code-generator
$ ls -la result/bin/
.r-xr-xr-x 2.9k root  1 Jan  1970 .datamodel-codegen-wrapped
.r-xr-xr-x 1.8k root  1 Jan  1970 datamodel-codegen
```

(cherry picked from commit f35afa3df0d71ad8ea929a338138b12bb11f9859)
---
 .../python-modules/datamodel-code-generator/default.nix         | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/python-modules/datamodel-code-generator/default.nix b/pkgs/development/python-modules/datamodel-code-generator/default.nix
index e542fbc0acbb..7e4cee264425 100644
--- a/pkgs/development/python-modules/datamodel-code-generator/default.nix
+++ b/pkgs/development/python-modules/datamodel-code-generator/default.nix
@@ -116,6 +116,6 @@ buildPythonPackage rec {
     changelog = "https://github.com/koxudaxi/datamodel-code-generator/releases/tag/${src.tag}";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ tochiaha ];
-    mainProgram = "datamodel-code-generator";
+    mainProgram = "datamodel-codegen";
   };
 }