diff --git a/pkgs/servers/firebird/default.nix b/pkgs/servers/firebird/default.nix
index 1377a7d5454d..da7146611cd3 100644
--- a/pkgs/servers/firebird/default.nix
+++ b/pkgs/servers/firebird/default.nix
@@ -40,7 +40,7 @@ let
       icu73
     ];
 
-    LD_LIBRARY_PATH = lib.makeLibraryPath [ icu73 ];
+    env.LD_LIBRARY_PATH = lib.makeLibraryPath [ icu73 ];
 
     configureFlags = [
       "--with-system-editline"