diff --git a/nix/t1/vcs.nix b/nix/t1/vcs.nix
index c2a681960..3b862f21f 100644
--- a/nix/t1/vcs.nix
+++ b/nix/t1/vcs.nix
@@ -26,8 +26,8 @@ stdenv.mkDerivation {
       -sverilog \
       -full64 \
       -timescale=1ns/1ps \
+      -P $VERDI_HOME/share/PLI/VCS/LINUX64/novas.tab $VERDI_HOME/share/PLI/VCS/LINUX64/pli.a \
       ${lib.optionalString vcs-dpi-lib.enable-trace ''
-        -P $VERDI_HOME/share/PLI/VCS/LINUX64/novas.tab $VERDI_HOME/share/PLI/VCS/LINUX64/pli.a \
         -debug_access+pp+dmptf+thread \
         -kdb=common_elab,hgldd_all''} \
       -file filelist.f \