diff -ru noto-emoji-d5e261484286d33a1fe8a02676f5907ecc02106f.orig/Makefile noto-emoji-d5e261484286d33a1fe8a02676f5907ecc02106f/Makefile
--- noto-emoji-d5e261484286d33a1fe8a02676f5907ecc02106f.orig/Makefile	2020-07-23 18:53:36.935321925 +0200
+++ noto-emoji-d5e261484286d33a1fe8a02676f5907ecc02106f/Makefile	2020-07-23 19:05:20.380141144 +0200
@@ -15,10 +15,10 @@
 EMOJI = NotoColorEmoji
 font: $(EMOJI).ttf
 
-CFLAGS = -std=c99 -Wall -Wextra `pkg-config --cflags --libs cairo`
+CFLAGS = $(OPT_CFLAGS) -Wextra `pkg-config --cflags --libs cairo`
 LDFLAGS = -lm `pkg-config --libs cairo`
 
-PNGQUANT = pngquant
+PNGQUANT = /usr/bin/pngquant
 PYTHON = python3
 PNGQUANTFLAGS = --speed 1 --skip-if-larger --quality 85-95 --force
 BODY_DIMENSIONS = 136x128
@@ -87,9 +87,9 @@
   endif
 endif
 
-ifndef VIRTUAL_ENV
-  MISSING_VENV = fail
-endif
+#ifndef VIRTUAL_ENV
+#  MISSING_VENV = fail
+#endif
 
 ifeq (, $(shell which $(VS_ADDER)))
   MISSING_PY_TOOLS = fail