Index: sys/conf/files
===================================================================
--- sys/conf/files
+++ sys/conf/files
@@ -10,12 +10,12 @@
 	no-obj no-implicit-rule before-depend				   \
 	clean		"acpi_quirks.h"
 bhnd_nvram_map.h		optional bhndbus | bhnd			   \
-	dependency	"sh $S/dev/bhnd/tools/nvram_map_gen.sh $S/dev/bhnd/tools/nvram_map_gen.awk $S/dev/bhnd/nvram/nvram_map" \
+	dependency	"$S/dev/bhnd/tools/nvram_map_gen.sh $S/dev/bhnd/tools/nvram_map_gen.awk $S/dev/bhnd/nvram/nvram_map" \
 	compile-with	"sh $S/dev/bhnd/tools/nvram_map_gen.sh $S/dev/bhnd/nvram/nvram_map -h" \
 	no-obj no-implicit-rule before-depend				   \
 	clean		"bhnd_nvram_map.h"
 bhnd_nvram_map_data.h		optional bhndbus | bhnd			   \
-	dependency	"sh $S/dev/bhnd/tools/nvram_map_gen.sh $S/dev/bhnd/tools/nvram_map_gen.awk $S/dev/bhnd/nvram/nvram_map" \
+	dependency	"$S/dev/bhnd/tools/nvram_map_gen.sh $S/dev/bhnd/tools/nvram_map_gen.awk $S/dev/bhnd/nvram/nvram_map" \
 	compile-with	"sh $S/dev/bhnd/tools/nvram_map_gen.sh $S/dev/bhnd/nvram/nvram_map -d" \
 	no-obj no-implicit-rule before-depend				   \
 	clean		"bhnd_nvram_map_data.h"
Index: sys/dev/bhnd/tools/nvram_map_gen.sh
===================================================================
--- sys/dev/bhnd/tools/nvram_map_gen.sh
+++ sys/dev/bhnd/tools/nvram_map_gen.sh
@@ -9,4 +9,4 @@
 
 LC_ALL=C; export LC_ALL
 
-"$BHND_TOOLDIR/nvram_map_gen.awk" $@
+"${AWK:-/usr/bin/awk}" -f "$BHND_TOOLDIR/nvram_map_gen.awk" $@