switch build container to void

.woodpecker.yml

@@ -4,12 +4,11 @@ when:
 
 steps:
   build:
-    image: gcc
+    image: ghcr.io/void-linux/void-glibc
+    environment:
+      - DEPENDENCIES=bash findutils base-devel libX11-devel libXft-devel harfbuzz-devel libXcursor-devel
     commands: |
-      apt-get update
-      apt-get install -y \
-        libx11-dev libxft-dev libfreetype6-dev \
-        libfontconfig1-dev libharfbuzz-dev libxcursor-dev
+      xbps-install -Syu xbps $${DEPENDENCIES}
       cp -f config.mk Makefile patches.h st-flexipatch/
       flexipatch-finalizer/flexipatch-finalizer.sh -r -d st-flexipatch -o st-final
       for patch in patches/*.diff; do

config.mk

@@ -8,7 +8,7 @@ PREFIX = /usr/local
 MANPREFIX = $(PREFIX)/share/man
 
 X11INC = /usr/include/X11
-X11LIB = /usr/lib/x86_64-linux-gnu
+X11LIB = /usr/lib
 
 PKG_CONFIG = pkg-config