I cant build an emoji myself, following the instructions guided the Build.md

[Asalerm]

After i run

rm -rf build/ && time make -j 48

i got

mkdir -p "build/emoji"
mkdir -p "build/quantized_pngs"
mkdir -p "build/compressed_pngs"
checking 3829 names
checking 3829 sequences
cannot process alias fe82b -> unknown_flag
cannot process alias fe82b -> unknown_flag
coverage: missing single 129673 (HARP)
coverage: missing single 129679 (SHOVEL)
coverage: missing single 129726 (LEAFLESS TREE)
coverage: missing single 129734 (FINGERPRINT)
coverage: missing single 129756 (ROOT VEGETABLE)
coverage: missing single 129759 (SPLATTER)
coverage: missing single 129769 (FACE WITH BAGS UNDER EYES)
coverage: missing combining sequence 1f1e8_1f1f6 (('flag: Sark', 16.0, b'RGI_Emoji_Flag_Sequence'))
coverage: missing combining sequence 1fa89 (('E16.0 harp', 16.0, b'Basic_Emoji'))
coverage: missing combining sequence 1fa8f (('E16.0 shovel', 16.0, b'Basic_Emoji'))
coverage: missing combining sequence 1fabe (('E16.0 leafless tree', 16.0, b'Basic_Emoji'))
coverage: missing combining sequence 1fac6 (('E16.0 fingerprint', 16.0, b'Basic_Emoji'))
coverage: missing combining sequence 1fadc (('E16.0 root vegetable', 16.0, b'Basic_Emoji'))
coverage: missing combining sequence 1fadf (('E16.0 splatter', 16.0, b'Basic_Emoji'))
coverage: missing combining sequence 1fae9 (('E16.0 face with bags under eyes', 16.0, b'Basic_Emoji'))
Please fix the problems mentioned above or run: make BYPASS_SEQUENCE_CHECK='True'
make: *** [Makefile:236: check_sequence] Error 1
make: *** Waiting for unfinished jobs....

real 0m18.487s
user 0m18.603s
sys 0m1.511s

The whole thing am trying to do is to reduce each emoji both width and height!
I just want 10% of width and 10% of height of the original height and width.