diff --git a/platformio.ini b/platformio.ini
index 10bf38f2f02..c66a485367d 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -16,16 +16,11 @@
 #
 
 [platformio]
-src_dir     = Marlin
-build_dir   = .pioenvs
-lib_dir     = .piolib
-libdeps_dir = .piolibdeps
-env_default = megaatmega2560
+src_dir      = Marlin
+default_envs = megaatmega2560
 
 [common]
-build_flags = -fmax-errors=5
-  -g
-  -ggdb
+build_flags = -fmax-errors=5 -g -fmerge-all-constants
 lib_deps =
   https://github.com/MarlinFirmware/U8glib-HAL/archive/dev.zip
   LiquidCrystal_I2C@1.1.2