1 files changed, 6 insertions, 0 deletions
diff --git a/pkgs/development/compilers/ocaml/4.02.nix b/pkgs/development/compilers/ocaml/4.02.nix
index 9610b78257602..42b9e21108d8c 100644
--- a/pkgs/development/compilers/ocaml/4.02.nix
+++ b/pkgs/development/compilers/ocaml/4.02.nix
@@ -10,4 +10,10 @@ import ./generic.nix {
       sha256 = "sha256:12sw512kpwk0xf2g6j0h5vqgd8xcmgrvgyilx6fxbd6bnfv1yib9"; }
   ];
   sha256 = "1qwwvy8nzd87hk8rd9sm667nppakiapnx4ypdwcrlnav2dz6kil3";
+
+  # Workaround build failure on -fno-common toolchains like upstream
+  # gcc-10. Otherwise build fails as:
+  #   ld: libcamlrun.a(startup.o):(.bss+0x800): multiple definition of
+  #     `caml_code_fragments_table'; libcamlrun.a(backtrace.o):(.bss+0x20): first defined here
+  NIX_CFLAGS_COMPILE = "-fcommon";
 }