bzip2 can be used from host

adk/tools/depmaker.c

@@ -132,6 +132,7 @@ static char *parse_line(char *package, char *pkgvar, char *string, int checksym,
 			}
 			strncat(depvar, dep, strlen(dep)-5);
 			if ((strncmp(depvar, "bc", 2) == 0) ||
+				(strncmp(depvar, "bzip2", 5) == 0) ||
 				(strncmp(depvar, "file", 4) == 0) ||
 				(strncmp(depvar, "gawk", 4) == 0) ||
 				(strncmp(depvar, "grep", 4) == 0) ||

package/busybox/Makefile

@@ -9,7 +9,6 @@ PKG_RELEASE:=		1
 PKG_HASH:=		37d03132cc078937360b392170b7a1d0e5b322eee9f57c0b82292a8b1f0afe3d
 PKG_DESCR:=		core utilities for embedded systems
 PKG_SECTION:=		base/apps
-PKG_BUILDDEP:=		bzip2-host
 PKG_URL:=		http://www.busybox.net/
 PKG_SITES:=		https://www.busybox.net/downloads/