diff --git a/pkgs/applications/blockchains/cgminer/default.nix b/pkgs/applications/blockchains/cgminer/default.nix
index a77924bb1f0..48a8d3ad930 100644
--- a/pkgs/applications/blockchains/cgminer/default.nix
+++ b/pkgs/applications/blockchains/cgminer/default.nix
@@ -39,6 +39,13 @@ stdenv.mkDerivation rec {
                      "--enable-keccak"
                      "--enable-bflsc"];
 
+  # Workaround build failure on -fno-common toolchains like upstream
+  # gcc-10. Otherwise build fails as:
+  #   ld: cgminer-driver-modminer.o:/build/source/miner.h:285:
+  #     multiple definition of `bitforce_drv'; cgminer-cgminer.o:/build/source/miner.h:285:
+  #     first defined here
+  NIX_CFLAGS_COMPILE = "-fcommon";
+
   meta = with lib; {
     description = "CPU/GPU miner in c for bitcoin";
     homepage = "https://github.com/ckolivas/cgminer";