diff --git a/pkgs/development/python-modules/lexilang/default.nix b/pkgs/development/python-modules/lexilang/default.nix
index 6c9b34bfc66b..3d334db4e951 100644
--- a/pkgs/development/python-modules/lexilang/default.nix
+++ b/pkgs/development/python-modules/lexilang/default.nix
@@ -6,7 +6,7 @@
   python,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "lexilang";
   version = "1.0.7";
   pyproject = true;
@@ -14,12 +14,20 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "LibreTranslate";
     repo = "LexiLang";
-    tag = "v${version}";
+    tag = "v${finalAttrs.version}";
     hash = "sha256-5/P9u2naTTyG5l3uhrinRIAekyOYn8OKLwb/VEON2Vc=";
   };
 
   build-system = [ setuptools ];
 
+  # Upstream builds in CI:
+  # https://github.com/LibreTranslate/LexiLang/blob/ba49108a736b9c077ea45cbe61d54fa635fe25d5/.github/workflows/publish.yml#L30-L31
+  postInstall = ''
+    ${lib.getExe python} -c "from lexilang.utils import compile_data; compile_data()"
+    rm -f lexilang/data/.gitignore
+    cp -r lexilang/data $out/${python.sitePackages}/lexilang/data
+  '';
+
   pythonImportsCheck = [ "lexilang" ];
 
   checkPhase = ''
@@ -34,4 +42,4 @@ buildPythonPackage rec {
     license = lib.licenses.agpl3Only;
     maintainers = with lib.maintainers; [ izorkin ];
   };
-}
+})