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-rw-r--r--pkgs/servers/mqtt/nanomq/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/servers/mqtt/nanomq/default.nix b/pkgs/servers/mqtt/nanomq/default.nix
index 482c274f2112a..ee56a44c11ca5 100644
--- a/pkgs/servers/mqtt/nanomq/default.nix
+++ b/pkgs/servers/mqtt/nanomq/default.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation (finalAttrs: {
     "-DNNG_ENABLE_TLS=ON"
   ];
 
-  NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isClang "-Wno-return-type";
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isClang "-Wno-return-type";
 
   meta = with lib; {
     description = "An ultra-lightweight and blazing-fast MQTT broker for IoT edge";