--- CMakeLists.txt
+++ CMakeLists.txt	2026-07-02 23:33:06.000000000 +0800
@@ -444,55 +444,10 @@
 endif() # JPEGXL_ENABLE_DOXYGEN
 
 if(JPEGXL_ENABLE_MANPAGES)
-  find_program(ASCIIDOC a2x)
   if(ASCIIDOC)
-    file(STRINGS "${ASCIIDOC}" ASCIIDOC_SHEBANG LIMIT_COUNT 1)
-    if(ASCIIDOC_SHEBANG MATCHES "sh( -e)?$" OR ASCIIDOC_SHEBANG MATCHES "libexec/bin/python$" OR MINGW)
-      set(ASCIIDOC_PY_FOUND ON)
-      # Run the program directly and set ASCIIDOC as empty.
-      set(ASCIIDOC_PY "${ASCIIDOC}")
-      set(ASCIIDOC "")
-    elseif(ASCIIDOC_SHEBANG MATCHES "python2")
-      find_package(Python2 COMPONENTS Interpreter)
-      set(ASCIIDOC_PY_FOUND "${Python2_Interpreter_FOUND}")
-      set(ASCIIDOC_PY Python2::Interpreter)
-    elseif(ASCIIDOC_SHEBANG MATCHES "python3")
-      find_package(Python3 COMPONENTS Interpreter)
-      set(ASCIIDOC_PY_FOUND "${Python3_Interpreter_FOUND}")
-      set(ASCIIDOC_PY Python3::Interpreter)
-    else()
-      find_package(Python COMPONENTS Interpreter QUIET)
-      if(NOT Python_Interpreter_FOUND)
-        find_program(ASCIIDOC_PY python)
-        if(ASCIIDOC_PY)
-          set(ASCIIDOC_PY_FOUND ON)
-        endif()
-      else()
-        set(ASCIIDOC_PY_FOUND "${Python_Interpreter_FOUND}")
-        set(ASCIIDOC_PY Python::Interpreter)
-      endif()
-    endif()
-
-    if (ASCIIDOC_PY_FOUND)
-      set(MANPAGE_FILES "")
-      set(MANPAGES "")
-      foreach(PAGE IN ITEMS cjxl djxl)
-        # Invoking the Python interpreter ourselves instead of running the a2x binary
-        # directly is necessary on MSYS2, otherwise it is run through cmd.exe which
-        # does not recognize it.
-        add_custom_command(
-          OUTPUT "${PAGE}.1"
-          COMMAND "${ASCIIDOC_PY}"
-          ARGS ${ASCIIDOC}
-            --format manpage --destination-dir="${CMAKE_CURRENT_BINARY_DIR}"
-            "${CMAKE_CURRENT_SOURCE_DIR}/doc/man/${PAGE}.txt"
-          MAIN_DEPENDENCY "${CMAKE_CURRENT_SOURCE_DIR}/doc/man/${PAGE}.txt")
-        list(APPEND MANPAGE_FILES "${CMAKE_CURRENT_BINARY_DIR}/${PAGE}.1")
-        list(APPEND MANPAGES "${PAGE}.1")
-      endforeach()
-      add_custom_target(manpages ALL DEPENDS ${MANPAGES})
-      install(FILES ${MANPAGE_FILES} DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)
-    endif()  # ASCIIDOC_PY_FOUND
+    set(ASCIIDOC_PY_FOUND ON)
+    set(ASCIIDOC_PY "${ASCIIDOC}")
+    set(ASCIIDOC "")
   else()
     message(WARNING "asciidoc was not found, the man pages will not be installed.")
   endif()  # ASCIIDOC