diff --git a/pkgs/build-support/dotnet/build-dotnet-module/default.nix b/pkgs/build-support/dotnet/build-dotnet-module/default.nix
index d7d6d68c6c53..514255f324ac 100644
--- a/pkgs/build-support/dotnet/build-dotnet-module/default.nix
+++ b/pkgs/build-support/dotnet/build-dotnet-module/default.nix
@@ -196,7 +196,7 @@ stdenvNoCC.mkDerivation (args // {
            TMPDIR=
         fi
 
-        export tmp=$(mktemp -d "deps-${pname}-XXXXXX")
+        export tmp=$(mktemp -td "deps-${pname}-XXXXXX")
         HOME=$tmp/home
 
         exitTrap() {