diff -Naur ORIG/cmake/Modules/FindPythia8.cmake PATCHED/cmake/Modules/FindPythia8.cmake
--- ORIG/cmake/Modules/FindPythia8.cmake	2026-03-27 17:24:53.352117325 +0000
+++ PATCHED/cmake/Modules/FindPythia8.cmake	2026-03-27 17:24:53.352136410 +0000
@@ -33,7 +33,7 @@
           HINTS $ENV{PYTHIA8_ROOT_DIR}/include ${PYTHIA8_ROOT_DIR}/include
           PATH_SUFFIXES include)
 
-find_file(PYTHIA8_XML xmldoc PATH_SUFFIXES share/Pythia8
+find_file(PYTHIA8_XML xmldoc PATH_SUFFIXES share/Pythia8  share/doc/packages/pythia
           HINTS ${PYTHIA8_INCLUDE_DIR}/.. $ENV{PYTHIA8_ROOT_DIR} ${PYTHIA8_ROOT_DIR})
 
 mark_as_advanced(PYTHIA8_INCLUDE_DIR PYTHIA8_XML)
