diff --git a/shell.nix b/shell.nix
index a6096242b..de09bff73 100644
--- a/shell.nix
+++ b/shell.nix
@@ -24,7 +24,7 @@ let
     shellHook = ''
       export PROMPT_INFO="${oldAttrs.name}"
 
-      export EDITOR=emacsclient
+      export PORT_OFFSET=$(((16#$(whoami | sha256sum | head -c 16)) % 1000))
 
       cleanup() {
         set +e -x
@@ -63,14 +63,14 @@ let
       if [[ -z "$WIDGET_MEMCACHED_HOST" ]]; then
         set -xe
 
-        memcached -l localhost -p 11211 &>/dev/null &
+        memcached -l localhost -p $(($PORT_OFFSET + 11211)) &>/dev/null &
         widget_memcached_pid=$?
 
         cleanup_widget_memcached() {
           [[ -n "$widget_memcached_pid" ]] && kill $widget_memcached_pid
         }
 
-        export WIDGET_MEMCACHED_HOST=localhost WIDGET_MEMCACHED_PORT=11211
+        export WIDGET_MEMCACHED_HOST=localhost WIDGET_MEMCACHED_PORT=$(($PORT_OFFSET + 11211))
 
         set +xe
       fi
@@ -78,14 +78,14 @@ let
       if [[ -z "$SESSION_MEMCACHED_HOST" ]]; then
         set -xe
 
-        memcached -l localhost -p 11212 &>/dev/null &
+        memcached -l localhost -p $(($PORT_OFFSET + 11212)) &>/dev/null &
         session_memcached_pid=$?
 
         cleanup_session_memcached() {
           [[ -n "$session_memcached_pid" ]] && kill $session_memcached_pid
         }
 
-        export SESSION_MEMCACHED_HOST=localhost SESSION_MEMCACHED_PORT=11212
+        export SESSION_MEMCACHED_HOST=localhost SESSION_MEMCACHED_PORT=$(($PORT_OFFSET + 11212))
 
         set +xe
       fi
@@ -93,14 +93,14 @@ let
       if [[ -z "$MEMCACHED_HOST" ]]; then
         set -xe
 
-        memcached -l localhost -p 11213 &>/dev/null &
+        memcached -l localhost -p $(($PORT_OFFSET + 11213)) &>/dev/null &
         memcached_pid=$?
 
         cleanup_session_memcached() {
           [[ -n "$memcached_pid" ]] && kill $memcached_pid
         }
 
-        export MEMCACHED_HOST=localhost MEMCACHED_PORT=11212
+        export MEMCACHED_HOST=localhost MEMCACHED_PORT=$(($PORT_OFFSET + 11212))
 
         set +xe
       fi
@@ -119,12 +119,12 @@ let
          export MINIO_ACCESS_KEY=$(${pkgs.pwgen}/bin/pwgen -s 16 1)
          export MINIO_SECRET_KEY=$(${pkgs.pwgen}/bin/pwgen -s 32 1)
 
-         minio server --address localhost:9000 ''${MINIO_DIR} &>''${MINIO_LOGFILE} &
+         minio server --address localhost:$(($PORT_OFFSET + 9000)) ''${MINIO_DIR} &>''${MINIO_LOGFILE} &
          minio_pid=$?
 
          sleep 1
 
-         export UPLOAD_S3_HOST=localhost UPLOAD_S3_PORT=9000 UPLOAD_S3_SSL=false UPLOAD_S3_KEY_ID=''${MINIO_ACCESS_KEY} UPLOAD_S3_KEY=''${MINIO_SECRET_KEY}
+         export UPLOAD_S3_HOST=localhost UPLOAD_S3_PORT=$(($PORT_OFFSET + 9000)) UPLOAD_S3_SSL=false UPLOAD_S3_KEY_ID=''${MINIO_ACCESS_KEY} UPLOAD_S3_KEY=''${MINIO_SECRET_KEY}
 
          set +xe
       fi
diff --git a/start.sh b/start.sh
index 329fdad02..e69f11277 100755
--- a/start.sh
+++ b/start.sh
@@ -31,10 +31,10 @@ fi
 
 if ! [ -z "$(which yesod)" ]
 then
-  yesod devel $@
+  yesod devel -p $((${PORT_OFFSET:-0} + 3000)) -q $((${PORT_OFFSET:-0} + 3443)) $@
 elif ! [ -z "$(which stack)" ]
 then
-  stack exec -- yesod devel $@
+  stack exec -- yesod devel -p $((${PORT_OFFSET:-0} + 3000)) -q $((${PORT_OFFSET:-0} + 3443)) $@
 else
   exit 1
 fi