There's no need to create a target version of nsinstall so always compile it for the host platform.

config/Makefile.in

@@ -26,15 +26,17 @@ VPATH		= @srcdir@
 
 include $(DEPTH)/config/autoconf.mk
 
-PROGRAM		= nsinstall$(BIN_SUFFIX)
 ifdef CROSS_COMPILE
-HOST_PROGRAM	= host_nsinstall
+HOST_PROGRAM	= nsinstall$(BIN_SUFFIX)
+else
+PROGRAM		= nsinstall$(BIN_SUFFIX)
 endif
 
-CSRCS		= nsinstall.c pathsub.c
 PLSRCS		= nfspwd.pl revdepth.pl
 ifdef CROSS_COMPILE
-HOST_CSRCS	= $(CSRCS)
+HOST_CSRCS	= nsinstall.c pathsub.c
+else
+CSRCS		= nsinstall.c pathsub.c
 endif
 
 TARGETS		= $(HOST_PROGRAM) $(PROGRAM) $(PLSRCS:.pl=)

config/config.mk

@@ -579,11 +579,7 @@ endif
 GARBAGE		+= $(DEPENDENCIES) $(MKDEPENDENCIES) $(MKDEPENDENCIES).bak core $(wildcard core.[0-9]*) $(wildcard *.err) $(wildcard *.pure) $(wildcard *_pure_*.o) Templates.DB
 
 ifneq (,$(filter-out WINNT, $(OS_ARCH)))
-ifdef CROSS_COMPILE
-NSINSTALL	= $(CONFIG_TOOLS)/host_nsinstall
-else
 NSINSTALL	= $(CONFIG_TOOLS)/nsinstall
-endif
 
 ifeq ($(NSDISTMODE),copy)
 # copy files, but preserve source mtime