diff --git a/procgen/CMakeLists.txt b/procgen/CMakeLists.txt
index 31084aa5..952a9f7a 100644
--- a/procgen/CMakeLists.txt
+++ b/procgen/CMakeLists.txt
@@ -16,7 +16,7 @@ if(APPLE)
   # clang defaults to 20 errors, but usually only the first one is useful
   add_compile_options(-ferror-limit=1)
   # only produce errors on mac where development is done
-  add_compile_options(-Werror -Wextra -Wshadow -Wall -Wformat=2 -Wundef -Wvla -Wmissing-include-dirs -Wnon-virtual-dtor -Wno-unused-parameter)
+  add_compile_options(-Werror -Wextra -Wshadow -Wall -Wformat=2 -Wundef -Wvla -Wmissing-include-dirs -Wnon-virtual-dtor -Wno-unused-parameter -Wno-unused-but-set-variable)
 endif()
 
 if(MSVC)
@@ -75,4 +75,4 @@ add_library(env
 # find libenv.h header
 target_include_directories(env PUBLIC ${LIBENV_DIR})
 
-target_link_libraries(env Qt5::Gui)
\ No newline at end of file
+target_link_libraries(env Qt5::Gui)