sha.diff

diff --git a/hphp/util/generate-buildinfo.sh b/hphp/util/generate-buildinfo.sh
index b3365e0..77195f3 100755
--- a/hphp/util/generate-buildinfo.sh
+++ b/hphp/util/generate-buildinfo.sh
@@ -79,7 +79,7 @@ fi
 if [ x"$HHVM_REPO_SCHEMA" = x"" ] ; then
   HHVM_REPO_SCHEMA=$(sh -c "$find_files" | \
       grep -v '^hphp/\(benchmarks\|bin\|hack\|hphp\|neo\|public_tld\|test\|tools\|util\|vixl\|zend\)' | \
-      xargs -d '\n' cat | sha1sum | cut -b-40)
+      xargs -d '\n' cat | shasum -a 1 | cut -b-40)
 fi

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