diff --git a/build.sh b/build.sh
index 3d91bdea..b58dba4b 100755
--- a/build.sh
+++ b/build.sh
@@ -5,7 +5,7 @@
 set -e
 set -u
 
-ROOT_DIR="$(realpath \"$0\")"
+ROOT_DIR="$(cd "$(dirname "$0")"; pwd -P)"
 
 if [[ ! -d ./pkg/lib-es5 ]]; then
   cd $ROOT_DIR/pkg
diff --git a/install.sh b/install.sh
index 19588154..94b3054c 100755
--- a/install.sh
+++ b/install.sh
@@ -7,7 +7,7 @@ set -u
 
 [[ -e ./bin/vim-doge ]] && exit 0
 
-ROOT_DIR="$(realpath \"$0\")"
+ROOT_DIR="$(cd "$(dirname "$0")"; pwd -P)"
 cd $ROOT_DIR
 mkdir ./bin