diff --git a/pkgs/by-name/li/lingua-franca/package.nix b/pkgs/by-name/li/lingua-franca/package.nix
index 1950d43a33b0..cf62ecd7d974 100644
--- a/pkgs/by-name/li/lingua-franca/package.nix
+++ b/pkgs/by-name/li/lingua-franca/package.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation (finalAttrs: {
 
   buildInputs = [ jdk17_headless ];
 
-  _JAVA_HOME = "${jdk17_headless}/";
+  env._JAVA_HOME = "${jdk17_headless}/";
 
   postPatch = ''
     substituteInPlace bin/lfc \