diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a74e103..4a4a8b9 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -106,7 +106,7 @@ variables:
 
 test:linux:bootstrap_script:
   before_script:
-    - ./.gitlab/before_script/linux/install_deps.sh
+    - ./.gitlab/before_script/linux/install_deps_minimal.sh
   script:
     - ./.gitlab/script/ghcup_bootstrap.sh
   variables:
diff --git a/.gitlab/before_script/linux/install_deps_minimal.sh b/.gitlab/before_script/linux/install_deps_minimal.sh
new file mode 100755
index 0000000..5dcff27
--- /dev/null
+++ b/.gitlab/before_script/linux/install_deps_minimal.sh
@@ -0,0 +1,10 @@
+#!/bin/sh
+
+set -eux
+
+. "$( cd "$(dirname "$0")" ; pwd -P )/../../ghcup_env"
+
+mkdir -p "${TMPDIR}"
+
+sudo apt-get update -y
+sudo apt-get install -y libnuma-dev zlib1g-dev libgmp-dev libgmp10 libssl-dev liblzma-dev git wget
diff --git a/.gitlab/script/ghcup_bootstrap.sh b/.gitlab/script/ghcup_bootstrap.sh
index 7ee3d46..a7ceb75 100755
--- a/.gitlab/script/ghcup_bootstrap.sh
+++ b/.gitlab/script/ghcup_bootstrap.sh
@@ -26,3 +26,5 @@ export BOOTSTRAP_HASKELL_CABAL_VERSION=$CABAL_VERSION
 
 ./bootstrap-haskell
 
+[ "$(ghc --numeric-version)" = "${GHC_VERSION}" ]
+