diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index d29cf996..23822e04 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,6 +1,7 @@
 .ubuntu: &ubuntu_def
   before_script:
-    - apt-get update && apt-get install -y debhelper devscripts fakeroot ${CMAKE} dh-exec gcc libncurses5-dev libreadline-dev libssl-dev make zlib1g-dev git
+    - apt-get update && apt-get install -y ${CMAKE} g++ gcc libncurses5-dev libreadline-dev libssl-dev make zlib1g-dev git file
+    - git submodule update --init --recursive
   script:
     - ./configure
     - make package -C tmp
diff --git a/src/BUILD_UNIX.md b/src/BUILD_UNIX.md
index d710bc0f..f11f95c7 100644
--- a/src/BUILD_UNIX.md
+++ b/src/BUILD_UNIX.md
@@ -36,7 +36,7 @@ sudo yum -y install cmake ncurses-devel openssl-devel readline-devel zlib-devel
 
 ## Install Requirements on Debian/Ubuntu
 ```bash
-sudo apt -y install cmake gcc libncurses5-dev libreadline-dev libssl-dev make zlib1g-dev
+sudo apt -y install cmake gcc g++ libncurses5-dev libreadline-dev libssl-dev make zlib1g-dev
 ```