diff --git a/pkgs/by-name/si/sigil/package.nix b/pkgs/by-name/si/sigil/package.nix
index 5e4cedcb7d21..c4621c07690c 100644
--- a/pkgs/by-name/si/sigil/package.nix
+++ b/pkgs/by-name/si/sigil/package.nix
@@ -21,7 +21,10 @@ stdenv.mkDerivation rec {
     hash = "sha256-cKnWAVLScPZYNAFOiXaoHSXMl3YNOh6zmEryILaOR4w=";
   };
 
-  pythonPath = with python3Packages; [ lxml ];
+  pythonPath = with python3Packages; [
+    lxml
+    dulwich
+  ];
 
   nativeBuildInputs = [
     cmake
@@ -37,6 +40,7 @@ stdenv.mkDerivation rec {
     qt6.qtwebengine
     qt6.qtsvg
     python3Packages.lxml
+    python3Packages.dulwich
   ];
 
   prePatch = ''