--- a/Makefile.am	2025-04-24 13:03:35.750405000 -0700
+++ b/Makefile.am	2025-04-24 13:24:52.995906000 -0700
@@ -32,9 +32,13 @@
 cygwin_specific_progs = src/cygdrop/cygdrop
 endif
 
+if WITH_LSSPARSE
+lssparse_progs = src/lssparse/lssparse
+endif
+
 bin_PROGRAMS = $(windows_progs) src/conv/conv \
 	src/dump/dump $(ipc_progs) \
-	src/lssparse/lssparse \
+	$(lssparse_progs) \
 	$(cygwin_specific_progs)
 
 bin_SCRIPTS = $(ipc_scripts)
--- a/configure.ac
+++ b/configure.ac
@@ -82,6 +82,7 @@ case "$host" in
 *cygwin* ) AC_MSG_ERROR([At least cygwin-1.7 is required]) ;;
 esac],dnl
   [[#include <sys/cygwin.h>]])
+AC_CHECK_DECL([SEEK_HOLE],[],[],[[#include <unistd.h>]])
 
 dnl Set Conditionals for Makefile.am
 AM_CONDITIONAL(WITH_WINDOWS_PROGRAMS, test "$ac_cv_func_OpenClipboard" = yes)
@@ -91,6 +92,7 @@ case "$host" in
 *cygwin* ) host_is_cygwin=yes ;;
 esac
 AM_CONDITIONAL(WITH_CYGWIN_SPECIFIC_PROGRAMS, test "$host_is_cygwin" = yes)
+AM_CONDITIONAL(WITH_LSSPARSE, test "$ac_cv_have_decl_SEEK_HOLE" = yes)
 
 AC_CONFIG_FILES([Makefile po/Makefile.in src/cygicons/cygicons.rc])