diff --git sndio-clean/configure sndio-workdir/configure
index d36e767..547c8fb 100755
--- sndio-clean/configure
+++ sndio-workdir/configure
@@ -63,10 +63,20 @@ unset defs				# no extra #defines
 unset ldadd				# no extra libraries (-l options)
 unset dev
 
+: "${UNAME:=`uname`}"
+
 #
 # guess OS-specific parameters
 #
-case `uname` in
+case ${UNAME} in
+	Astral)
+		oss=yes
+		ldadd="-lrt -lm"
+		user=sndiod
+		so_link="libsndio.so libsndio.so.\${MAJ} libsndio.so.\${MAJ}.0"
+		so_ldflags="-Wl,-soname=libsndio.so.\${MAJ}"
+		defs='-D_GNU_SOURCE -DHAVE_SOCK_CLOEXEC -DHAVE_CLOCK_GETTIME'
+		;;
 	Linux)
 		alsa=yes
 		ldadd="-lrt -lm"
diff --git sndio-clean/libsndio/sio_oss.c sndio-workdir/libsndio/sio_oss.c
index 7614497..1fc8ad6 100644
--- sndio-clean/libsndio/sio_oss.c
+++ sndio-workdir/libsndio/sio_oss.c
@@ -66,15 +66,6 @@ static struct sio_oss_fmt formats[] = {
 	{ AFMT_S24_BE, 24, 3, 1, 0, 1 },
 	{ AFMT_S24_LE, 24, 3, 1, 1, 0 },
 	{ AFMT_S24_LE, 24, 3, 1, 1, 1 },
-	{ AFMT_U24_BE, 24, 3, 0, 0, 0 },
-	{ AFMT_U24_BE, 24, 3, 0, 0, 1 },
-	{ AFMT_U24_LE, 24, 3, 0, 1, 0 },
-	{ AFMT_U24_LE, 24, 3, 0, 1, 1 },
-
-	{ AFMT_S32_BE, 32, 4, 1, 0, 1 },
-	{ AFMT_S32_LE, 32, 4, 1, 1, 1 },
-	{ AFMT_U32_BE, 32, 4, 0, 0, 1 },
-	{ AFMT_U32_LE, 32, 4, 0, 1, 1 },
 };
 
 struct sio_oss_hdl {
@@ -147,8 +138,7 @@ sio_oss_getcap(struct sio_hdl *sh, struct sio_cap *cap)
 		48000, 64000, 88200, 96000, 192000
 	};
 	static int afmts[] = {
-		AFMT_U8, AFMT_S16_LE, AFMT_S16_BE, AFMT_S24_LE, AFMT_U24_LE,
-		AFMT_S32_LE, AFMT_U32_LE
+		AFMT_U8, AFMT_S16_LE, AFMT_S16_BE, AFMT_S24_LE,
 	};
 	struct sio_oss_hdl *hdl = (struct sio_oss_hdl *)sh;
 	unsigned int nconf = 0;
@@ -287,12 +277,14 @@ sio_oss_getfd(const char *str, unsigned int mode, int nbio)
 		return -1;
 	}
 
+#ifndef __astral__
 	val = 1;
 	if (ioctl(fd, SNDCTL_DSP_LOW_WATER, &val) == -1) {
 		DPERROR("sio_oss_start: LOW_WATER");
 		close(fd);
 		return -1;
 	}
+#endif
 	return fd;
 }