diff --git a/pkgs/servers/firebird/default.nix b/pkgs/servers/firebird/default.nix
index 557231de14f3..2fa35510bf6a 100644
--- a/pkgs/servers/firebird/default.nix
+++ b/pkgs/servers/firebird/default.nix
@@ -50,6 +50,7 @@ let
       runHook preInstall
       mkdir -p $out
       cp -r gen/Release/firebird/* $out
+      rm $out/lib/*.a  # they were just symlinks to /build/source/...
       runHook postInstall
     '';