diff --git a/pkgs/development/python-modules/eventlet/default.nix b/pkgs/development/python-modules/eventlet/default.nix
index 92ff2cdacaf..e8cb1971f2e 100644
--- a/pkgs/development/python-modules/eventlet/default.nix
+++ b/pkgs/development/python-modules/eventlet/default.nix
@@ -29,7 +29,7 @@ buildPythonPackage rec {
 
   doCheck = !stdenv.isDarwin;
 
-  preCheck = ''
+  preCheck = lib.optionalString doCheck ''
     echo "nameserver 127.0.0.1" > resolv.conf
     export NIX_REDIRECTS=/etc/protocols=${iana-etc}/etc/protocols:/etc/resolv.conf=$(realpath resolv.conf)
     export LD_PRELOAD=${libredirect}/lib/libredirect.so