diff --git a/build/libraries/cs/_ b/build/libraries/cs/@
similarity index 100%
rename from build/libraries/cs/_
rename to build/libraries/cs/@
diff --git a/build/libraries/devices/sdmc/_ b/build/libraries/devices/sdmc/@
similarity index 100%
rename from build/libraries/devices/sdmc/_
rename to build/libraries/devices/sdmc/@
diff --git a/build/libraries/fatfs/_ b/build/libraries/fatfs/@
similarity index 100%
rename from build/libraries/fatfs/_
rename to build/libraries/fatfs/@