diff --git a/pkgs/development/compilers/bs-platform/ocaml.nix b/pkgs/development/compilers/bs-platform/ocaml.nix
index 05fb8b6b17e..3fe0e0b2eed 100644
--- a/pkgs/development/compilers/bs-platform/ocaml.nix
+++ b/pkgs/development/compilers/bs-platform/ocaml.nix
@@ -5,6 +5,13 @@ stdenv.mkDerivation rec {
   configurePhase = ''
     ./configure -prefix $out
   '';
+
+  # Workaround ocaml-4.06 limitation of duplicate definitions.
+  #   ld: libcamlrun.a(minor_gc.o):/build/ocaml/byterun/caml/major_gc.h:67: multiple definition of
+  #     `caml_major_ring'; libcamlrun.a(stacks.o):/build/ocaml/byterun/caml/major_gc.h:67: first defined here
+  # Match -fcommon workaround in ocaml-4.06 itself.
+  NIX_CFLAGS_COMPILE = "-fcommon";
+
   buildPhase = ''
     make -j9 world.opt
   '';