diff --git a/src/lib/Hydra/Helper/Nix.pm b/src/lib/Hydra/Helper/Nix.pm
index 1072cf28..134b8b7e 100644
--- a/src/lib/Hydra/Helper/Nix.pm
+++ b/src/lib/Hydra/Helper/Nix.pm
@@ -422,8 +422,7 @@ sub readIntoSocket{
     my $sock;
 
     eval {
-        my $x= join(" ", @{$args{cmd}});
-        open($sock, "-|", $x) or die q(failed to open socket from command:\n $x);
+        open($sock, "-|", @{$args{cmd}}) or die q(failed to open socket from command:\n $x);
     };
 
     return $sock;