diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index aeec73545..dfb6563bd 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -192,7 +192,7 @@ jobs:
         [options]
         flow:build = True
         flow:doc = False
-        boost:extra_b2_flags = "-d 4"
+        boost:extra_b2_flags = "-d 7"
         EOF
     
     - name: Install Flow dependencies with Conan using the profile