diff --git a/app/commander/commander.go b/app/commander/commander.go
index 20c0f02d..26794d04 100644
--- a/app/commander/commander.go
+++ b/app/commander/commander.go
@@ -1,6 +1,6 @@
 package commander
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg commander -path App,Commander
+//go:generate errorgen
 
 import (
 	"context"
diff --git a/app/dispatcher/default.go b/app/dispatcher/default.go
index e899bd86..fe020215 100644
--- a/app/dispatcher/default.go
+++ b/app/dispatcher/default.go
@@ -1,6 +1,6 @@
 package dispatcher
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg impl -path App,Dispatcher,Default
+//go:generate errorgen
 
 import (
 	"context"
diff --git a/app/dispatcher/dispatcher.go b/app/dispatcher/dispatcher.go
index 498522c5..4a08c6b6 100644
--- a/app/dispatcher/dispatcher.go
+++ b/app/dispatcher/dispatcher.go
@@ -2,7 +2,7 @@ package dispatcher
 
 import "context"
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg dispatcher -path App,Dispatcher
+//go:generate errorgen
 
 type key int
 
diff --git a/app/dns/dns.go b/app/dns/dns.go
index ae2421ef..28024235 100644
--- a/app/dns/dns.go
+++ b/app/dns/dns.go
@@ -1,4 +1,4 @@
 // Package dns is an implementation of core.DNS feature.
 package dns
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg dns -path App,DNS
+//go:generate errorgen
diff --git a/app/dns/server.go b/app/dns/server.go
index deb5665b..1a286619 100644
--- a/app/dns/server.go
+++ b/app/dns/server.go
@@ -1,6 +1,6 @@
 package dns
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg dns -path App,DNS
+//go:generate errorgen
 
 import (
 	"context"
diff --git a/app/log/command/command.go b/app/log/command/command.go
index a85f854e..ac33f5b5 100644
--- a/app/log/command/command.go
+++ b/app/log/command/command.go
@@ -1,6 +1,6 @@
 package command
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg command -path App,Log,Command
+//go:generate errorgen
 
 import (
 	"context"
diff --git a/app/log/log.go b/app/log/log.go
index d8b6afd1..82e95aea 100644
--- a/app/log/log.go
+++ b/app/log/log.go
@@ -1,6 +1,6 @@
 package log
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg log -path App,Log
+//go:generate errorgen
 
 import (
 	"context"
diff --git a/app/policy/policy.go b/app/policy/policy.go
index 492e4596..c7a43524 100644
--- a/app/policy/policy.go
+++ b/app/policy/policy.go
@@ -1,4 +1,4 @@
 // Package policy is an implementation of core.PolicyManager feature.
 package policy
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg policy -path App,Policy
+//go:generate errorgen
diff --git a/app/proxyman/command/doc.go b/app/proxyman/command/doc.go
index 8c18efaf..a9d2624e 100644
--- a/app/proxyman/command/doc.go
+++ b/app/proxyman/command/doc.go
@@ -1,3 +1,3 @@
 package command
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg command -path App,Proxyman,Command
+//go:generate errorgen
diff --git a/app/proxyman/inbound/inbound.go b/app/proxyman/inbound/inbound.go
index 888564ec..c6436713 100644
--- a/app/proxyman/inbound/inbound.go
+++ b/app/proxyman/inbound/inbound.go
@@ -1,6 +1,6 @@
 package inbound
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg inbound -path App,Proxyman,Inbound
+//go:generate errorgen
 
 import (
 	"context"
diff --git a/app/proxyman/mux/mux.go b/app/proxyman/mux/mux.go
index 732c6d20..cdcd6372 100644
--- a/app/proxyman/mux/mux.go
+++ b/app/proxyman/mux/mux.go
@@ -1,6 +1,6 @@
 package mux
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg mux -path App,Proxyman,Mux
+//go:generate errorgen
 
 import (
 	"context"
diff --git a/app/proxyman/outbound/outbound.go b/app/proxyman/outbound/outbound.go
index 91bc2c44..6c5df275 100644
--- a/app/proxyman/outbound/outbound.go
+++ b/app/proxyman/outbound/outbound.go
@@ -1,6 +1,6 @@
 package outbound
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg outbound -path App,Proxyman,Outbound
+//go:generate errorgen
 
 import (
 	"context"
diff --git a/app/router/router.go b/app/router/router.go
index ac1d8db6..ae7f6412 100644
--- a/app/router/router.go
+++ b/app/router/router.go
@@ -1,6 +1,6 @@
 package router
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg router -path App,Router
+//go:generate errorgen
 
 import (
 	"context"
diff --git a/app/stats/command/command.go b/app/stats/command/command.go
index 2c7feb0d..e44b0f49 100644
--- a/app/stats/command/command.go
+++ b/app/stats/command/command.go
@@ -1,6 +1,6 @@
 package command
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg command -path App,Stats,Command
+//go:generate errorgen
 
 import (
 	"context"
diff --git a/app/stats/stats.go b/app/stats/stats.go
index 3a12b74e..94bcb792 100644
--- a/app/stats/stats.go
+++ b/app/stats/stats.go
@@ -1,6 +1,6 @@
 package stats
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg stats -path App,Stats
+//go:generate errorgen
 
 import (
 	"context"
diff --git a/common/buf/buf.go b/common/buf/buf.go
index 584815f4..39335479 100644
--- a/common/buf/buf.go
+++ b/common/buf/buf.go
@@ -1,4 +1,4 @@
 // Package buf provides a light-weight memory allocation mechanism.
 package buf // import "v2ray.com/core/common/buf"
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg buf -path Buf
+//go:generate errorgen
diff --git a/common/common.go b/common/common.go
index 2f58ba7f..f7f8b02c 100644
--- a/common/common.go
+++ b/common/common.go
@@ -2,7 +2,7 @@
 // See each sub-package for detail.
 package common
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg common -path Common
+//go:generate errorgen
 
 // Must panics if err is not nil.
 func Must(err error) {
diff --git a/common/crypto/crypto.go b/common/crypto/crypto.go
index 45797a8a..d98e8dfe 100644
--- a/common/crypto/crypto.go
+++ b/common/crypto/crypto.go
@@ -1,4 +1,4 @@
 // Package crypto provides common crypto libraries for V2Ray.
 package crypto // import "v2ray.com/core/common/crypto"
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg crypto -path Crypto
+//go:generate errorgen
diff --git a/common/net/net.go b/common/net/net.go
index b44beedb..da929836 100644
--- a/common/net/net.go
+++ b/common/net/net.go
@@ -1,4 +1,4 @@
 // Package net is a drop-in replacement to Golang's net package, with some more functionalities.
 package net // import "v2ray.com/core/common/net"
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg net -path Net
+//go:generate errorgen
diff --git a/common/platform/ctlcmd/ctlcmd.go b/common/platform/ctlcmd/ctlcmd.go
index 60d219cf..0e1506c3 100644
--- a/common/platform/ctlcmd/ctlcmd.go
+++ b/common/platform/ctlcmd/ctlcmd.go
@@ -9,7 +9,7 @@ import (
 	"v2ray.com/core/common/platform"
 )
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg ctlcmd -path Command,Platform,CtlCmd
+//go:generate errorgen
 
 func Run(args []string, input io.Reader) (buf.MultiBuffer, error) {
 	v2ctl := platform.GetToolLocation("v2ctl")
diff --git a/common/protocol/tls/cert/cert.go b/common/protocol/tls/cert/cert.go
index d12da482..36598c66 100644
--- a/common/protocol/tls/cert/cert.go
+++ b/common/protocol/tls/cert/cert.go
@@ -11,7 +11,7 @@ import (
 	"v2ray.com/core/common"
 )
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg cert -path Protocol,TLS,Cert
+//go:generate errorgen
 
 type Certificate struct {
 	// Cerificate in ASN.1 DER format
diff --git a/common/retry/retry.go b/common/retry/retry.go
index b2c78599..c719e267 100644
--- a/common/retry/retry.go
+++ b/common/retry/retry.go
@@ -1,6 +1,6 @@
 package retry // import "v2ray.com/core/common/retry"
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg retry -path Retry
+//go:generate errorgen
 
 import (
 	"time"
diff --git a/core.go b/core.go
index 9a427d36..e9a70caa 100755
--- a/core.go
+++ b/core.go
@@ -9,7 +9,8 @@
 // connections.
 package core
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg core -path Core
+//go:generate go install "v2ray.com/core/common/errors/errorgen"
+//go:generate errorgen
 
 import (
 	"v2ray.com/core/common/serial"
diff --git a/main/confloader/external/external.go b/main/confloader/external/external.go
index 21cc709a..4c78ef6e 100644
--- a/main/confloader/external/external.go
+++ b/main/confloader/external/external.go
@@ -10,7 +10,7 @@ import (
 	"v2ray.com/core/main/confloader"
 )
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg external -path Main,ConfLoader,External
+//go:generate errorgen
 
 type ClosableMultiBuffer struct {
 	buf.MultiBuffer
diff --git a/main/json/config_json.go b/main/json/config_json.go
index a0981487..81ac55f4 100644
--- a/main/json/config_json.go
+++ b/main/json/config_json.go
@@ -1,6 +1,6 @@
 package json
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg json -path Main,Json
+//go:generate errorgen
 
 import (
 	"io"
diff --git a/main/main.go b/main/main.go
index 63813408..e9dca864 100644
--- a/main/main.go
+++ b/main/main.go
@@ -1,6 +1,6 @@
 package main
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg main -path Main
+//go:generate errorgen
 
 import (
 	"flag"
diff --git a/proxy/blackhole/blackhole.go b/proxy/blackhole/blackhole.go
index e584295e..4451efd4 100644
--- a/proxy/blackhole/blackhole.go
+++ b/proxy/blackhole/blackhole.go
@@ -1,7 +1,7 @@
 // Package blackhole is an outbound handler that blocks all connections.
 package blackhole
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg blackhole -path Proxy,Blackhole
+//go:generate errorgen
 
 import (
 	"context"
diff --git a/proxy/dokodemo/dokodemo.go b/proxy/dokodemo/dokodemo.go
index f347b05d..4d372d87 100644
--- a/proxy/dokodemo/dokodemo.go
+++ b/proxy/dokodemo/dokodemo.go
@@ -1,6 +1,6 @@
 package dokodemo
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg dokodemo -path Proxy,Dokodemo
+//go:generate errorgen
 
 import (
 	"context"
diff --git a/proxy/freedom/freedom.go b/proxy/freedom/freedom.go
index 41cfecab..a55619c4 100644
--- a/proxy/freedom/freedom.go
+++ b/proxy/freedom/freedom.go
@@ -1,6 +1,6 @@
 package freedom
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg freedom -path Proxy,Freedom
+//go:generate errorgen
 
 import (
 	"context"
diff --git a/proxy/http/http.go b/proxy/http/http.go
index 8ed94a4a..cb8ad4e9 100644
--- a/proxy/http/http.go
+++ b/proxy/http/http.go
@@ -1,3 +1,3 @@
 package http
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg http -path Proxy,HTTP
+//go:generate errorgen
diff --git a/proxy/mtproto/mtproto.go b/proxy/mtproto/mtproto.go
index 0f3dc37a..75629fe7 100644
--- a/proxy/mtproto/mtproto.go
+++ b/proxy/mtproto/mtproto.go
@@ -1,3 +1,3 @@
 package mtproto
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg mtproto -path Proxy,MTProto
+//go:generate errorgen
diff --git a/proxy/shadowsocks/shadowsocks.go b/proxy/shadowsocks/shadowsocks.go
index b01bc5b5..c7418441 100644
--- a/proxy/shadowsocks/shadowsocks.go
+++ b/proxy/shadowsocks/shadowsocks.go
@@ -13,4 +13,4 @@
 // R.I.P Shadowsocks
 package shadowsocks
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg shadowsocks -path Proxy,Shadowsocks
+//go:generate errorgen
diff --git a/proxy/socks/socks.go b/proxy/socks/socks.go
index c0997729..ac2da5a4 100644
--- a/proxy/socks/socks.go
+++ b/proxy/socks/socks.go
@@ -1,4 +1,4 @@
 // Package socks provides implements of Socks protocol 4, 4a and 5.
 package socks
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg socks -path Proxy,Socks
+//go:generate errorgen
diff --git a/proxy/vmess/encoding/encoding.go b/proxy/vmess/encoding/encoding.go
index a016f15b..f6d04947 100644
--- a/proxy/vmess/encoding/encoding.go
+++ b/proxy/vmess/encoding/encoding.go
@@ -5,7 +5,7 @@ import (
 	"v2ray.com/core/common/protocol"
 )
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg encoding -path Proxy,VMess,Encoding
+//go:generate errorgen
 
 const (
 	Version = byte(1)
diff --git a/proxy/vmess/inbound/inbound.go b/proxy/vmess/inbound/inbound.go
index 0dc00f1e..4f624326 100644
--- a/proxy/vmess/inbound/inbound.go
+++ b/proxy/vmess/inbound/inbound.go
@@ -1,6 +1,6 @@
 package inbound
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg inbound -path Proxy,VMess,Inbound
+//go:generate errorgen
 
 import (
 	"context"
diff --git a/proxy/vmess/outbound/outbound.go b/proxy/vmess/outbound/outbound.go
index adad38ae..0e531b36 100644
--- a/proxy/vmess/outbound/outbound.go
+++ b/proxy/vmess/outbound/outbound.go
@@ -1,6 +1,6 @@
 package outbound
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg outbound -path Proxy,VMess,Outbound
+//go:generate errorgen
 
 import (
 	"context"
diff --git a/proxy/vmess/vmess.go b/proxy/vmess/vmess.go
index 03ad2fab..2c40b120 100644
--- a/proxy/vmess/vmess.go
+++ b/proxy/vmess/vmess.go
@@ -5,7 +5,7 @@
 // clients with 'socks' for proxying.
 package vmess
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg vmess -path Proxy,VMess
+//go:generate errorgen
 
 import (
 	"strings"
diff --git a/transport/internet/domainsocket/errgen.go b/transport/internet/domainsocket/errgen.go
index 33e38e41..d4501e83 100644
--- a/transport/internet/domainsocket/errgen.go
+++ b/transport/internet/domainsocket/errgen.go
@@ -1,3 +1,3 @@
 package domainsocket
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg domainsocket -path Transport,Internet,DomainSocket
+//go:generate errorgen
diff --git a/transport/internet/headers/http/http.go b/transport/internet/headers/http/http.go
index a8a21ae8..b1b28fda 100644
--- a/transport/internet/headers/http/http.go
+++ b/transport/internet/headers/http/http.go
@@ -1,6 +1,6 @@
 package http
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg http -path Transport,Internet,Headers,HTTP
+//go:generate errorgen
 
 import (
 	"bytes"
diff --git a/transport/internet/http/http.go b/transport/internet/http/http.go
index e532ed9c..cb8ad4e9 100644
--- a/transport/internet/http/http.go
+++ b/transport/internet/http/http.go
@@ -1,3 +1,3 @@
 package http
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg http -path Transport,Internet,HTTP
+//go:generate errorgen
diff --git a/transport/internet/internet.go b/transport/internet/internet.go
index 226e42ae..77027eaa 100644
--- a/transport/internet/internet.go
+++ b/transport/internet/internet.go
@@ -1,3 +1,3 @@
 package internet
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg internet -path Transport,Internet
+//go:generate errorgen
diff --git a/transport/internet/kcp/kcp.go b/transport/internet/kcp/kcp.go
index c0c58168..177b6517 100644
--- a/transport/internet/kcp/kcp.go
+++ b/transport/internet/kcp/kcp.go
@@ -5,4 +5,4 @@
 //    xtaci@github for translating to Golang
 package kcp
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg kcp -path Transport,Internet,mKCP
+//go:generate errorgen
diff --git a/transport/internet/tcp/tcp.go b/transport/internet/tcp/tcp.go
index 72409305..05307a11 100644
--- a/transport/internet/tcp/tcp.go
+++ b/transport/internet/tcp/tcp.go
@@ -1,3 +1,3 @@
 package tcp
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg tcp -path Transport,Internet,TCP
+//go:generate errorgen
diff --git a/transport/internet/tls/tls.go b/transport/internet/tls/tls.go
index efb3b422..f21ea5f9 100644
--- a/transport/internet/tls/tls.go
+++ b/transport/internet/tls/tls.go
@@ -7,7 +7,7 @@ import (
 	"v2ray.com/core/common/net"
 )
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg tls -path Transport,Internet,TLS
+//go:generate errorgen
 
 var (
 	_ buf.Writer = (*conn)(nil)
diff --git a/transport/internet/udp/udp.go b/transport/internet/udp/udp.go
index 250ea679..cbcebe44 100644
--- a/transport/internet/udp/udp.go
+++ b/transport/internet/udp/udp.go
@@ -1,5 +1,5 @@
 package udp
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg udp -path Transport,Internet,UDP
+//go:generate errorgen
 
 const protocolName = "udp"
diff --git a/transport/internet/websocket/ws.go b/transport/internet/websocket/ws.go
index e9863b03..7edd1344 100755
--- a/transport/internet/websocket/ws.go
+++ b/transport/internet/websocket/ws.go
@@ -4,4 +4,4 @@ Websocket transport implements an HTTP(S) compliable, surveillance proof transpo
 */
 package websocket
 
-//go:generate go run $GOPATH/src/v2ray.com/core/common/errors/errorgen/main.go -pkg websocket -path Transport,Internet,WebSocket
+//go:generate errorgen