diff --git a/scripts/commit_hash.sh b/scripts/commit_hash.sh
index cd20bcb14..ae8206881 100755
--- a/scripts/commit_hash.sh
+++ b/scripts/commit_hash.sh
@@ -4,7 +4,7 @@
 commit=$(git describe --tags)
 dirty=$(git ls-files -m)
 if [[ -n ${dirty} ]]; then
-    commit="$commit+dirty.$(echo ${dirty} | git hash-object --stdin | head -c8)"
+    commit="$commit+dirty.$(echo ${dirty} | git hash-object --stdin | dd bs=8 count=1 status=none)"
 fi
 echo "$commit"
 
diff --git a/tests/dump/test.sh b/tests/dump/test.sh
index c9ef25486..5bebcbfa0 100755
--- a/tests/dump/test.sh
+++ b/tests/dump/test.sh
@@ -48,7 +48,7 @@ echo -e "${title//?/-}\n${title}\n${title//?/-}\n"
 
 $burrow_bin dump remote -b dump.bin
 $burrow_bin dump remote dump.json
-height=$(head -1  dump.json | jq .Height)
+height=$(head -n 1  dump.json | jq .Height)
 
 kill $burrow_pid