diff --git a/pkgs/development/interpreters/python/hooks/default.nix b/pkgs/development/interpreters/python/hooks/default.nix
index ea2511b2881c..42244dabb0d0 100644
--- a/pkgs/development/interpreters/python/hooks/default.nix
+++ b/pkgs/development/interpreters/python/hooks/default.nix
@@ -229,7 +229,7 @@ in {
       name = "python${python.pythonVersion}-sphinx-hook";
       propagatedBuildInputs = [ pythonOnBuildForHost.pkgs.sphinx installShellFiles ];
       substitutions = {
-        sphinxBuild = "${pythonForBuild.pkgs.sphinx}/bin/sphinx-build";
+        sphinxBuild = "${pythonOnBuildForHost.pkgs.sphinx}/bin/sphinx-build";
       };
     } ./sphinx-hook.sh) {};
 }