diff --git a/pkgs/servers/monitoring/net-snmp/default.nix b/pkgs/servers/monitoring/net-snmp/default.nix
index c53f52422cf9..f2533c99b083 100644
--- a/pkgs/servers/monitoring/net-snmp/default.nix
+++ b/pkgs/servers/monitoring/net-snmp/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
       "--with-logfile=/var/log/net-snmpd.log"
       "--with-persistent-directory=/var/lib/net-snmp"
       "--with-openssl=${openssl}"
-    ] ++ stdenv.lib.optional stdenv.isLinux [ "--with-mnttab=/proc/mounts" ];
+    ] ++ stdenv.lib.optional stdenv.isLinux "--with-mnttab=/proc/mounts";
 
   buildInputs = [ autoreconfHook file perl unzip openssl ];