Mine

--- conf/machine/include/zaurus-clamshell-2.6.conf      eccc6bd783e09d0c79b07a1a43e010b38a5e35a8
+++ conf/machine/include/zaurus-clamshell-2.6.conf      eecccd98764ef4f2e6db2e6b23b55389e917beb5
@@ -37,10 +37,12 @@
                              hostap-conf orinoco-conf"

 # Sound Modules
-BOOTSTRAP_EXTRA_RDEPENDS += "kernel-module-soundcore kernel-module-snd kernel-module-snd-page-alloc kernel-odule-snd-timer \
-                             kernel-module-snd-pcm kernel-module-snd-mixer-oss kernel-module-snd-pcm-oss \
+BOOTSTRAP_EXTRA_RDEPENDS += "kernel-module-snd-mixer-oss kernel-module-snd-pcm-oss"
+BOOTSTRAP_EXTRA_SOUND    = "kernel-module-soundcore kernel-module-snd kernel-module-snd-page-alloc kernel-module-snd-timer \
+                             kernel-module-snd-pcm  \
                              kernel-module-snd-soc-core kernel-module-snd-soc-pxa2xx kernel-module-snd-soc-pxa2xx-i2s"
+
+BOOTSTRAP_EXTRA_RDEPENDS_append_c7x0 += "${BOOTSTRAP_EXTRA_SOUND} kernel-module-snd-soc-corgi kernel-module-snd-soc-wm8731 "
+BOOTSTRAP_EXTRA_RDEPENDS_append_akita += "${BOOTSTRAP_EXTRA_SOUND} kernel-module-snd-soc-spitz kernel-module-snd-soc-wm8750 "
+BOOTSTRAP_EXTRA_RDEPENDS_append_borzoi += "${BOOTSTRAP_EXTRA_SOUND} kernel-module-snd-soc-spitz kernel-module-snd-soc-wm8750 "
+BOOTSTRAP_EXTRA_RDEPENDS_append_spitz += "${BOOTSTRAP_EXTRA_SOUND} kernel-module-snd-soc-spitz kernel-module-snd-soc-wm8750 "
-BOOTSTRAP_EXTRA_RDEPENDS_append_c7x0 += " kernel-module-snd-soc-corgi kernel-module-snd-soc-wm8731 "
-BOOTSTRAP_EXTRA_RDEPENDS_append_akita += " kernel-module-snd-soc-spitz kernel-module-snd-soc-wm8750 "
-BOOTSTRAP_EXTRA_RDEPENDS_append_borzoi += " kernel-module-snd-soc-spitz kernel-module-snd-soc-wm8750 "
-BOOTSTRAP_EXTRA_RDEPENDS_append_spitz += " kernel-module-snd-soc-spitz kernel-module-snd-soc-wm8750 "