Original patch by Julian Ospald <hasufell@gentoo.org>.
Bug: https://bugs.gentoo.org/423327

--- Eternal-Lands-1.9.7/io/elfilewrapper.c
+++ Eternal-Lands-1.9.7/io/elfilewrapper.c
@@ -1,5 +1,5 @@
 #include "elfilewrapper.h"
-#include "unzip.h"
+#include <unzip.h>
 #include "elpathwrapper.h"
 #include "fileutil.h"
 #include <sys/stat.h>
--- Eternal-Lands-1.9.7/io/ziputil.h
+++ Eternal-Lands-1.9.7/io/ziputil.h
@@ -8,8 +8,8 @@
 
 #include <SDL.h>
 #include "../md5.h"
-#include "zip.h"
-#include "unzip.h"
+#include <zip.h>
+#include <unzip.h>
 
 #ifdef __cplusplus
 extern "C"
--- Eternal-Lands-1.9.7/Makefile.linux
+++ Eternal-Lands-1.9.7/Makefile.linux
@@ -21,6 +21,7 @@
 	cal3d \
 	gl \
 	glu \
+	minizip \
 	openal \
 	vorbis \
 	vorbisfile \
@@ -83,7 +84,7 @@
 	hud.o hud_misc_window.o hud_quickbar_window.o hud_statsbar_window.o hud_quickspells_window.o	\
 	help.o highlight.o ignore.o image_loading.o init.o interface.o items.o io/fileutil.o	\
 	io/e3d_io.o io/elc_io.o	io/map_io.o io/elpathwrapper.o io/xmlcallbacks.o \
-	io/half.o io/normal.o io/elfilewrapper.o io/unzip.o io/ioapi.o io/zip.o io/ziputil.o	\
+	io/half.o io/normal.o io/elfilewrapper.o io/ziputil.o	\
 	keys.o knowledge.o langselwin.o lights.o list.o load_gl_extensions.o loginwin.o loading_win.o	\
 	main.o manufacture.o map.o mapwin.o	\
 	md5.o mines.o minimap.o misc.o missiles.o multiplayer.o	\
--- Eternal-Lands-1.9.7/new_update.c
+++ Eternal-Lands-1.9.7/new_update.c
@@ -10,8 +10,8 @@
 #include <string.h>
 #include "md5.h"
 #include "elc_private.h"
-#include "io/zip.h"
-#include "io/unzip.h"
+#include <zip.h>
+#include <unzip.h>
 #include "io/ziputil.h"
 #include "io/fileutil.h"
 #include "io/elfilewrapper.h"