diff --git a/pkgs/by-name/lv/lv/package.nix b/pkgs/by-name/lv/lv/package.nix
index a60851fa7ba9..b0684b25532b 100644
--- a/pkgs/by-name/lv/lv/package.nix
+++ b/pkgs/by-name/lv/lv/package.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation {
 
   # Upstream needs quite a bit of porting to c23:
   #   https://github.com/ttdoda/lv/issues/3
-  NIX_CFLAGS_COMPILE = "-std=gnu17";
+  env.NIX_CFLAGS_COMPILE = "-std=gnu17";
 
   preAutoreconf = "cd src";
   postAutoreconf = "cd ..";