diff --git a/Makefile b/Makefile
index 3651e8c..69180e2 100644
--- a/Makefile
+++ b/Makefile
@@ -48,5 +48,5 @@ clean:
 	${Q}make ${MAKEOPTS} -C system clean
 	${Q}make ${MAKEOPTS} -C boot_code clean
 
-upload:
+upload: boot_code/gnome_sort.txt
 	make -C system upload
diff --git a/boot_code/Makefile b/boot_code/Makefile
index 888dcbc..4fa7926 100644
--- a/boot_code/Makefile
+++ b/boot_code/Makefile
@@ -11,6 +11,7 @@ all: ${BINARIES}
 brainfuck_interpreted.bin: brainfuck_interpreter_v0.asm hello_9086.bf.asm dos_layer.asm
 brainfuck_compiled.bin: brainfuck_compiler_v1.asm hello_9086.bf.asm dos_layer.asm
 brainfuck_mandelbrot.bin: brainfuck_compiler_v1.asm mandelbrot.bf.asm dos_layer.asm
+colored_led.bin: dos_layer.asm
 
 fibonacci.bin: helpers.asm
 gnome_sort.bin: helpers.asm
diff --git a/system/Makefile b/system/Makefile
index 45d13f7..fc65db4 100644
--- a/system/Makefile
+++ b/system/Makefile
@@ -75,7 +75,7 @@ simplified_ucode.txt:ucode.txt
 	${Q}tr 'x' '0' < $^ | sed 's@//.*@@' | grep ^@ |sort | sed 's/.* .//;s/ $$//' | tr -d _ > $@
 
 #TODO: we are relying on yosys to trim the input program txt file and hope its enough for the whole program...
-synth_ecp5.json: ${SOURCES} ${TOP_LEVEL_SOURCE} fpga_config/${FPGA_BOARD}/fpga_top.v ${EXTRA_SYNTHESIS_SOURCES} ${INCLUDES} ../boot_code/colored_led.txt simplified_ucode.txt
+synth_ecp5.json: ${SOURCES} ${TOP_LEVEL_SOURCE} fpga_config/${FPGA_BOARD}/fpga_top.v ${EXTRA_SYNTHESIS_SOURCES} ${INCLUDES} ../boot_code/gnome_sort.txt simplified_ucode.txt
 	${QUIET_YOSYS}
 	${Q} yosys -q -D BUILTIN_RAM=512 -D NOT_FULL -p 'read -sv '"${SOURCES} ${TOP_LEVEL_SOURCE} fpga_config/${FPGA_BOARD}/fpga_top.v ${EXTRA_SYNTHESIS_SOURCES} ; synth_ecp5 -json $@ -top fpga_top"