diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7fb7abf..9050088 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -37,9 +37,9 @@ if (EMSCRIPTEN)
         INTERFACE_COMPILE_OPTIONS ${option}
         INTERFACE_LINK_OPTIONS ${option})
   endfunction()
-  add_emscripten_library(zlib "SHELL:-s USE_ZLIB=1")
-  add_emscripten_library(sdl2 "SHELL:-s USE_SDL=2")
-  add_emscripten_library(sdl2_ttf "SHELL:-s USE_SDL_TTF=2")
+  add_emscripten_library(zlib -sUSE_ZLIB=1)
+  add_emscripten_library(sdl2 -sUSE_SDL=2)
+  add_emscripten_library(sdl2_ttf -sUSE_SDL_TTF=2)
   set(DEFAULT_FONT_PATH /fonts/)
 
 elseif (ANDROID)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 5753cbe..88dc07e 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -158,15 +158,16 @@ if (EMSCRIPTEN)
   list(APPEND CMAKE_EXE_LINKER_FLAGS_DEBUG "-O1")
 
   target_link_options(xsystem35 PRIVATE
-    "SHELL:-s ENVIRONMENT=web"
-    "SHELL:-s ASYNCIFY=1 -s ASYNCIFY_IGNORE_INDIRECT=1"
-    "SHELL:-s ASYNCIFY_REMOVE=SDL_Delay"
-    "SHELL:-s ASYNCIFY_IMPORTS=muspcm_load_no,muspcm_load_data,muspcm_load_mixlr,muspcm_waitend,wait_vsync,load_mincho_font"
-    "SHELL:-s ASYNCIFY_ADD=commands2F60,nact_main,send_agsevent,cb_waitkey_sprite"
-    "SHELL:-s ALLOW_MEMORY_GROWTH=1"
-    "SHELL:-s NO_EXIT_RUNTIME=1"
-    "SHELL:-s EXPORTED_FUNCTIONS=_main,_malloc"
-    "SHELL:-s EXPORTED_RUNTIME_METHODS=getValue,addRunDependency,removeRunDependency")
+    -sENVIRONMENT=web
+    -sASYNCIFY=1
+    -sASYNCIFY_IGNORE_INDIRECT=1
+    -sASYNCIFY_REMOVE=SDL_Delay
+    -sASYNCIFY_IMPORTS=muspcm_load_no,muspcm_load_data,muspcm_load_mixlr,muspcm_waitend,wait_vsync,load_mincho_font
+    -sASYNCIFY_ADD=commands2F60,nact_main,send_agsevent,cb_waitkey_sprite
+    -sALLOW_MEMORY_GROWTH=1
+    -sNO_EXIT_RUNTIME=1
+    -sEXPORTED_FUNCTIONS=_main,_malloc
+    -sEXPORTED_RUNTIME_METHODS=getValue,addRunDependency,removeRunDependency)
 
 elseif (ANDROID)
   target_link_libraries(xsystem35 PRIVATE ${ndk_log})