diff --git a/nix/pkgs/snps-fhs-env.nix b/nix/pkgs/snps-fhs-env.nix
index 7aea101623..7cc9546863 100644
--- a/nix/pkgs/snps-fhs-env.nix
+++ b/nix/pkgs/snps-fhs-env.nix
@@ -59,6 +59,7 @@ lockedPkgs.buildFHSEnv {
     export -f preHook
   '';
   targetPkgs = (ps: with ps; [
+    perl
     libGL
     util-linux
     libxcrypt-legacy
diff --git a/nix/t1/run/default.nix b/nix/t1/run/default.nix
index 453bb7ddef..06ac3d1e4f 100644
--- a/nix/t1/run/default.nix
+++ b/nix/t1/run/default.nix
@@ -98,7 +98,7 @@ let
     cp -vr $emuOutput $out
     chmod -R u+w $out
 
-    ${vcs-emu.snps-fhs-env}/bin/snps-fhs-env -c "urg -dir $emuOutput/*/cm.vdb -format text -metric line+tgl+assert -show summary"
+    ${vcs-emu.snps-fhs-env}/bin/snps-fhs-env -c "urg -dir $emuOutput/*/cm.vdb -format text -metric line+tgl+assert -show summary -parallel"
     cp -vr urgReport $out/
   '';
 in