diff --git a/debian/etc-taler-exchange/taler/conf.d/exchange-business.conf b/debian/etc-taler-exchange/taler/conf.d/exchange-business.conf
index 7547e8264..89583d5be 100644
--- a/debian/etc-taler-exchange/taler/conf.d/exchange-business.conf
+++ b/debian/etc-taler-exchange/taler/conf.d/exchange-business.conf
@@ -6,11 +6,11 @@
 # which you can get using `taler-exchange-offline setup`.
 # This is just an example, your key will be different!
 # MASTER_PUBLIC_KEY = YE6Q6TR1EDB7FD0S68TGDZGF1P0GHJD2S0XVV8R2S62MYJ6HJ4ZG
-MASTER_PUBLIC_KEY =
+# MASTER_PUBLIC_KEY =
 
 # Publicly visible base URL of the exchange.
 # BASE_URL = https://example.com/
-BASE_URL =
+# BASE_URL =
 
 # For your terms of service and privacy policy, you should specify
 # an Etag that must be updated whenever there are significant
@@ -20,6 +20,8 @@ BASE_URL =
 # TERMS_ETAG =
 # PRIVACY_ETAG =
 
+SERVE = unix
+UNIXPATH_MODE = 666
 
 # Bank accounts used by the exchange should be specified here:
 [exchange-account-1]
diff --git a/debian/taler-exchange.postinst b/debian/taler-exchange.postinst
index b2379c706..892e48475 100644
--- a/debian/taler-exchange.postinst
+++ b/debian/taler-exchange.postinst
@@ -30,6 +30,7 @@ configure)
   if ! getent passwd ${_EUSERNAME} >/dev/null; then
     adduser --quiet --system --no-create-home --ingroup ${_GROUPNAME} --home ${TALER_HOME} ${_EUSERNAME}
     adduser --quiet ${_EUSERNAME} ${_DBGROUPNAME}
+    adduser --quiet ${_EUSERNAME} ${_GROUPNAME}
   fi
   if ! getent passwd ${_RSECUSERNAME} >/dev/null; then
     adduser --quiet --system --no-create-home --ingroup ${_GROUPNAME} --home ${TALER_HOME} ${_RSECUSERNAME}
diff --git a/src/exchange/taler-exchange-httpd.c b/src/exchange/taler-exchange-httpd.c
index 5b1adb59f..c88ddd7c8 100644
--- a/src/exchange/taler-exchange-httpd.c
+++ b/src/exchange/taler-exchange-httpd.c
@@ -1939,6 +1939,9 @@ exchange_serve_process_config (void)
       GNUNET_free (master_public_key_str);
       return GNUNET_SYSERR;
     }
+    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+                "Launching exchange with public key `%s'...\n",
+                master_public_key_str);
     GNUNET_free (master_public_key_str);
   }
 
@@ -1961,9 +1964,6 @@ exchange_serve_process_config (void)
                         &TEH_attribute_key.hash);
     GNUNET_free (attr_enc_key_str);
   }
-  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
-              "Launching exchange with public key `%s'...\n",
-              GNUNET_p2s (&TEH_master_public_key.eddsa_pub));
 
   if (NULL ==
       (TEH_plugin = TALER_EXCHANGEDB_plugin_load (TEH_cfg)))