diff --git a/nginx.nix b/nginx.nix
index 24121ab..6f12e4d 100644
--- a/nginx.nix
+++ b/nginx.nix
@@ -36,10 +36,10 @@ in {
       forceSSL = true;
       # sslCertificateKey = "/etc/nginx/certs/ca.key";
       # sslCertificate = "/etc/nginx/certs/ca.crt";
-      extraConfig = '''
+      extraConfig = ''
         ssl_client_certificate /etc/nginx/certs/client.crt;
         ssl_verify_client on;
-          ''';
+      '';
       locations."/" = {
         # TODO fastcgi to the script
         extraConfig = "return 200 'handshake worked !!!';";