diff --git a/.env.sample b/.env.sample
index 5006a97bcd..8aadc87daf 100644
--- a/.env.sample
+++ b/.env.sample
@@ -16,3 +16,4 @@ WP_TEST_MAILER_SMTP_LOGIN=""
 WP_TEST_MAILER_SMTP_PASSWORD=""
 WP_SVN_USERNAME=""
 WP_SVN_PASSWORD=""
+WP_TRANSIFEX_API_TOKEN=""
\ No newline at end of file
diff --git a/README.md b/README.md
index fa67966383..1a3b4206cc 100644
--- a/README.md
+++ b/README.md
@@ -129,6 +129,19 @@ _n()
 
 You can use Twig i18n functions in Handlebars, just load your template from a Twig view.
 
+# Build
+
+To build a plugin , run `./build.sh`.
+
+Some build process steps are described below (their dependencies etc.).
+
+## packtranslations step
+
+This step imports translations from Transifex and generates MO files. It requires:
+* `tx` client: https://docs.transifex.com/client/installing-the-client
+* `msgfmt` command (from Gettext package)
+Finally , a `WP_TRANSIFEX_API_TOKEN` environment variable should be initialized with a valid key.
+
 # Publish
 
 Before you run a publishing command, you need to:
diff --git a/tasks/pack_translations.sh b/tasks/pack_translations.sh
old mode 100644
new mode 100755
index c3636bb4b4..975f3a59f8
--- a/tasks/pack_translations.sh
+++ b/tasks/pack_translations.sh
@@ -10,7 +10,7 @@ if [ ! -f ~/.transifexrc ]; then
 fi
 
 echo "Getting translations from Transifex..."
-tx pull -a
+tx pull -a -f
 
 echo "Generating MO files..."
 for file in `find ./lang/ -name "*.po"` ; do