diff --git a/semantic-source/cabal.project.ci b/semantic-source/cabal.project.ci
new file mode 100644
index 000000000..d04e5621d
--- /dev/null
+++ b/semantic-source/cabal.project.ci
@@ -0,0 +1,4 @@
+packages: .
+
+package semantic-source
+  ghc-options: -Werror