diff --git a/doc/release.md b/doc/release.md
index 061802b..314d716 100644
--- a/doc/release.md
+++ b/doc/release.md
@@ -31,17 +31,6 @@ git push origin 6-6-stable 6.6.0.omnibus
 
 ### One-time
 
-- Set up the `attach.sh` script
-
-```shell
-sudo su - omnibus-build
-cat > attach.sh <<EOF
-#!/bin/sh
-script -c 'screen -x || screen' /dev/null
-EOF
-chmod +x attach.sh
-```
-
 - Install release dependencies
 
 ```shell
@@ -56,6 +45,11 @@ sudo pip install awscli
 aws configure # enter AWS key and secret
 ```
 
+# Make sure sendmail is installed; for Debian 7
+```shell
+sudo apt-get install sendmail-bin
+```
+
 - Set up a deploy key to fetch the GitLab EE source code.
 - Put your email address in `~omnibus-build/.forward`.
 - Test email delivery:
@@ -64,6 +58,18 @@ aws configure # enter AWS key and secret
 echo "Subject: testing from $(uname -n)" | sendmail $(whoami)
 ```
 
+- Set up the `attach.sh` script
+
+```shell
+# For Debian 7 install screen first; sudo apt-get install screen
+sudo su - omnibus-build
+cat > attach.sh <<EOF
+#!/bin/sh
+script -c 'screen -x || screen' /dev/null
+EOF
+chmod +x attach.sh
+```
+
 ### Each build
 
 - Log in as the build user and start a screen session
@@ -104,4 +110,4 @@ This will `clean --purge` the build environment, build a package and upload it t
 See a previous [CE example](https://gitlab.com/gitlab-com/www-gitlab-com/merge_requests/141)
 and [EE example](https://dev.gitlab.org/gitlab/gitlab-ee/commit/7301417820404f92ca7c0a9940408ef414ef3c01).
 
-[the gitlab-rails version in omnibus-gitlab]: ../master/config/software/gitlab-rails.rb#L20
\ No newline at end of file
+[the gitlab-rails version in omnibus-gitlab]: ../master/config/software/gitlab-rails.rb#L20
--
libgit2 0.21.2