AUTOUIC doesn't detect UI files when include is on the first line

project("proj")

set(CMAKE_PREFIX_PATH "$ENV{QTDIR}")
find_package(Qt5Core REQUIRED)
find_package(Qt5Widgets REQUIRED)

set(CMAKE_INCLUDE_CURRENT_DIR "YES")
set(CMAKE_AUTOMOC "YES")
set(CMAKE_AUTOUIC "YES")

add_executable("proj" MACOSX_BUNDLE main.cpp)
target_link_libraries("proj" Qt5::Core Qt5::Widgets)

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class&gt;Form</class&gt;
 <widget class="QWidget" name="Form">
 </widget>
 <resources/>
 <connections/>
</ui>

#include "ui_form.h"
int main() {
}

$ cmake --build .
Scanning dependencies of target proj_automoc
[ 25%] Automatic moc and uic for target proj
Generating moc compilation proj_automoc.cpp
[ 25%] Built target proj_automoc
Scanning dependencies of target proj
[ 50%] Building CXX object CMakeFiles/proj.dir/main.cpp.o
main.cpp:1:10: fatal error: 'ui_form.h' file not found
#include "ui_form.h"
         ^
1 error generated.
make[2]: *** [CMakeFiles/proj.dir/main.cpp.o] Error 1
make[1]: *** [CMakeFiles/proj.dir/all] Error 2
make: *** [all] Error 2

#include "ui_form.h"
int main() {
}