diff --git a/.github/workflows/steamrt4.yml b/.github/workflows/steamrt4.yml
index 2e6cfc2b8..b14ff11ad 100644
--- a/.github/workflows/steamrt4.yml
+++ b/.github/workflows/steamrt4.yml
@@ -9,6 +9,7 @@ on:
       - main
 
 env:
+  DEBIAN_FRONTEND: noninteractive
   BUILD_TYPE: Release
   CC: clang
   CXX: clang++
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 3cf9676ee..c4fd489ce 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,5 @@
 variables:
+    DEBIAN_FRONTEND: noninteractive
     GIT_SUBMODULE_STRATEGY: recursive
     CC: clang
     CXX: clang++