diff --git a/pkgs/applications/misc/khal/default.nix b/pkgs/applications/misc/khal/default.nix
index 6aa94b2fecb8..756c8e259718 100644
--- a/pkgs/applications/misc/khal/default.nix
+++ b/pkgs/applications/misc/khal/default.nix
@@ -42,6 +42,7 @@ with python3.pkgs; buildPythonApplication rec {
     install -D misc/__khal $out/share/zsh/site-functions/__khal
 
     # man page
+    PATH="${python3.withPackages (ps: with ps; [ sphinx sphinxcontrib_newsfeed ])}/bin:$PATH" \
     make -C doc man
     install -Dm755 doc/build/man/khal.1 -t $out/share/man/man1