diff --git a/pkgs/applications/editors/quartus-prime/default.nix b/pkgs/applications/editors/quartus-prime/default.nix
index ef9164f3228c..8da6cd44ca70 100644
--- a/pkgs/applications/editors/quartus-prime/default.nix
+++ b/pkgs/applications/editors/quartus-prime/default.nix
@@ -90,7 +90,7 @@ in buildFHSEnvChroot rec {
   # we use the name so that quartus can load the 64 bit verson and modelsim can load the 32 bit version
   # https://community.intel.com/t5/Intel-FPGA-Software-Installation/Running-Quartus-Prime-Standard-on-WSL-crashes-in-libudev-so/m-p/1189032
   profile = ''
-    export LD_PRELOAD=libudev.so.0
+    export LD_PRELOAD=''${LD_PRELOAD:+$LD_PRELOAD:}libudev.so.0
   '';
 
   # Run the wrappers directly, instead of going via bash.