diff --git a/doc/how_to_run.md b/doc/how_to_run.md
index 3a4961f..6773b3d 100644
--- a/doc/how_to_run.md
+++ b/doc/how_to_run.md
@@ -16,6 +16,8 @@
 --------
 If you want to modify source code and confirm it, you can run GitBucket in auto reloading mode as following:
 
+Windows:
+
 ```
 C:\gitbucket> sbt
 ...
@@ -24,20 +26,38 @@
 > ~ ;copy-resources;aux-compile
 ```
 
+Linux:
+
+```
+~/gitbucket$ ./sbt.sh
+...
+> container:start
+...
+> ~ ;copy-resources;aux-compile
+```
+
 Build war file
 --------
 
 To build war file, run the following command:
 
+Windows:
+
 ```
 C:\gitbucket> sbt package
 ```
 
+Linux:
+
+```
+~/gitbucket$ ./sbt.sh package
+```
+
 `gitbucket_2.11-x.x.x.war` is generated into `target/scala-2.11`.
 
 To build executable war file, run
 
-*  `. ./env.sh`
-*  `ant -f release/build.xml all`
+*  Windows: `???`
+*  Linux: `./release/make-release-war.sh`
 
 at the top of the source tree. It generates executable `gitbucket.war` into `target/scala-2.11`. We release this war file as release artifact.
diff --git a/release/make-release-war.sh b/release/make-release-war.sh
index c276cf9..b9aacec 100755
--- a/release/make-release-war.sh
+++ b/release/make-release-war.sh
@@ -1,3 +1,15 @@
 #!/bin/sh
-. ../env.sh
-ant -f build.xml all
+D="$(dirname "$0")"
+D="$(cd "${D}"; pwd)"
+DD="$(dirname "${D}")"
+(
+  for f in "${DD}/env.sh" "${D}/build.xml"; do
+    if [ ! -s "${f}" ]; then
+      echo >&2 "$0: Unable to access file '${f}'"
+      exit 1
+    fi
+  done
+  cd "${DD}"
+  . "${DD}/env.sh"
+  ant -f "${D}/build.xml" all
+)