--- tgl/Makefile.in.orig	2020-04-27 11:49:17 UTC
+++ tgl/Makefile.in
@@ -41,7 +41,7 @@ endif
 # Check if -frandom-seed is supported before enabling it
 RANDOM_SEED_UNSUPPORTED = $(shell $(CC) -frandom-seed=77e0418a98676b76729b50fe91cc1f250c14fd8f664f8430649487a6f918926d 2>&1 | grep -c 'random-seed')
 ifeq "$(RANDOM_SEED_UNSUPPORTED)" "0"
-	CFLAGS += -frandom-seed=0x$$(sha256sum $< | cut -f1 -d" ")
+	CFLAGS += -frandom-seed=0x$$(sha256 $< | cut -f1 -d" ")
 endif
 # Check if -ffile-prefix-map is supported before enabling it
 FILE_PREFIX_MAP_UNSUPPORTED = $(shell $(CC) -ffile-prefix-map=/foo/bar/baz=/quux 2>&1 | grep -c 'file-prefix-map')