diff --git a/pkgs/development/web/valum/default.nix b/pkgs/development/web/valum/default.nix
index a11e0f4cb975..caf29a2cc027 100644
--- a/pkgs/development/web/valum/default.nix
+++ b/pkgs/development/web/valum/default.nix
@@ -21,5 +21,8 @@ stdenv.mkDerivation rec {
     license = licenses.lgpl3;
     platforms = platforms.linux;
     maintainers = [ ];
+    # Likely broken by GLib 2.74 switch to PCRE 2.
+    # https://github.com/valum-framework/valum/issues/238
+    broken = true;
   };
 }