diff --git a/lib/ir/dune b/lib/ir/dune
index 9013c4ef0379a3dca3b24a5736f4e5203f640ff2..5b92d58d7c631fea187dbb2cfa94b6501f42ffd2 100644
--- a/lib/ir/dune
+++ b/lib/ir/dune
@@ -9,7 +9,7 @@
    ppx_deriving.iter
    ppx_deriving.fold))
  (inline_tests)
- (libraries base ocplib-endian piqirun.pb zarith ocamlgraph stdio))
+ (libraries base ocplib-endian ocamlgraph stdio))
 
 (env
  (dev