diff --git a/keyboards/capsunlocked/cu75/rules.mk b/keyboards/capsunlocked/cu75/rules.mk
index 6274267ab1..d3979a9149 100644
--- a/keyboards/capsunlocked/cu75/rules.mk
+++ b/keyboards/capsunlocked/cu75/rules.mk
@@ -9,4 +9,6 @@ BOOTLOADER = atmel-dfu
 #
 BACKLIGHT_DRIVER = custom
 
-SRC = ../lfkeyboards/TWIlib.c ../lfkeyboards/issi.c ../lfkeyboards/lighting.c
+# TODO: These boards need to be converted to RGB Matrix
+VPATH += keyboards/lfkeyboards
+SRC = TWIlib.c issi.c lighting.c
diff --git a/keyboards/ergodox_ez/keymaps/default_glow/rules.mk b/keyboards/ergodox_ez/keymaps/default_glow/rules.mk
index 360c3c51b8..20bac4ab9d 100644
--- a/keyboards/ergodox_ez/keymaps/default_glow/rules.mk
+++ b/keyboards/ergodox_ez/keymaps/default_glow/rules.mk
@@ -1,4 +1,4 @@
 RGBLIGHT_ENABLE = no
 RGB_MATRIX_ENABLE = yes # enable later
 
-SRC += ../default/keymap.c
+SRC += keymaps/default/keymap.c
diff --git a/keyboards/hhkb/ansi/post_rules.mk b/keyboards/hhkb/ansi/post_rules.mk
index bc6ad5cd4c..eb9a8f0adb 100644
--- a/keyboards/hhkb/ansi/post_rules.mk
+++ b/keyboards/hhkb/ansi/post_rules.mk
@@ -4,14 +4,14 @@ OPT_DEFS += -DHHKB_RN42_ENABLE
 
 # Support for the RN42 Bluetooth module. This is the BT module in Hasu's BT
 # HHKB Alt controller.
-RN42_DIR = ../rn42
+RN42_DIR = keyboards/hhkb/rn42
 
 SRC +=  serial_uart.c \
-	../rn42/suart.S \
-	../rn42/rn42.c \
-	../rn42/rn42_task.c \
-	../rn42/battery.c \
-	../rn42/main.c
+	suart.S \
+	rn42.c \
+	rn42_task.c \
+	battery.c \
+	main.c
 
 VPATH += $(RN42_DIR)
 
diff --git a/keyboards/hhkb/jp/post_rules.mk b/keyboards/hhkb/jp/post_rules.mk
index bc6ad5cd4c..eb9a8f0adb 100644
--- a/keyboards/hhkb/jp/post_rules.mk
+++ b/keyboards/hhkb/jp/post_rules.mk
@@ -4,14 +4,14 @@ OPT_DEFS += -DHHKB_RN42_ENABLE
 
 # Support for the RN42 Bluetooth module. This is the BT module in Hasu's BT
 # HHKB Alt controller.
-RN42_DIR = ../rn42
+RN42_DIR = keyboards/hhkb/rn42
 
 SRC +=  serial_uart.c \
-	../rn42/suart.S \
-	../rn42/rn42.c \
-	../rn42/rn42_task.c \
-	../rn42/battery.c \
-	../rn42/main.c
+	suart.S \
+	rn42.c \
+	rn42_task.c \
+	battery.c \
+	main.c
 
 VPATH += $(RN42_DIR)
 
diff --git a/keyboards/rgbkb/mun/rules.mk b/keyboards/rgbkb/mun/rules.mk
index d2ad9cdcc2..a682f3aa04 100644
--- a/keyboards/rgbkb/mun/rules.mk
+++ b/keyboards/rgbkb/mun/rules.mk
@@ -5,8 +5,9 @@ MCU = STM32F303
 BOOTLOADER = stm32-dfu
 
 # Touch encoder needs
-SRC += ../common/touch_encoder.c
-SRC += ../common/common_oled.c
+VPATH += keyboards/rgbkb/common
+SRC += touch_encoder.c
+SRC += common_oled.c
 QUANTUM_LIB_SRC += i2c_master.c
 
 # Build Options
@@ -35,8 +36,7 @@ SERIAL_DRIVER = usart
 LTO_ENABLE = yes
 OPT = 3
 
-OPT_DEFS += -DOLED_FONT_H=\"../common/glcdfont.c\"
-OPT_DEFS += -Ikeyboards/rgbkb/common
+OPT_DEFS += -DOLED_FONT_H=\"keyboards/rgbkb/common/glcdfont.c\"
 
 # matrix optimisations
 SRC += matrix.c
diff --git a/keyboards/rgbkb/sol3/rules.mk b/keyboards/rgbkb/sol3/rules.mk
index 8389a7a9c4..e30330d333 100644
--- a/keyboards/rgbkb/sol3/rules.mk
+++ b/keyboards/rgbkb/sol3/rules.mk
@@ -5,8 +5,9 @@ MCU = STM32F303
 BOOTLOADER = stm32-dfu
 
 # Touch encoder needs
-SRC += ../common/touch_encoder.c
-SRC += ../common/common_oled.c
+VPATH += keyboards/rgbkb/common
+SRC += touch_encoder.c
+SRC += common_oled.c
 QUANTUM_LIB_SRC += i2c_master.c
 
 # Build Options
@@ -39,8 +40,7 @@ SERIAL_DRIVER = usart
 LTO_ENABLE = yes
 OPT = 3
 
-OPT_DEFS += -DOLED_FONT_H=\"../common/glcdfont.c\"
-OPT_DEFS += -Ikeyboards/rgbkb/common
+OPT_DEFS += -DOLED_FONT_H=\"keyboards/rgbkb/common/glcdfont.c\"
 
 # TODO: Implement fast matrix scanning
 # matrix optimisations