diff --git a/pkgs/tools/misc/shallot/default.nix b/pkgs/tools/misc/shallot/default.nix
index c3c88a6baf0..93f67bd2def 100644
--- a/pkgs/tools/misc/shallot/default.nix
+++ b/pkgs/tools/misc/shallot/default.nix
@@ -30,6 +30,11 @@ stdenv.mkDerivation rec {
     })
   ];
 
+  # Workaround build failure on -fno-common toolchains like upstream
+  # gcc-10. Otherwise build fails as:
+  #   ld: src/shallot.o:(.bss+0x8): multiple definition of `lucky_thread'; src/error.o:(.bss+0x8): first defined here
+  NIX_CFLAGS_COMPILE = "-fcommon";
+
   installPhase = ''
     mkdir -p $out/bin
     cp ./shallot $out/bin/