我有非常简单的带有 Iris 的 Go 应用程序，我正在尝试将其部署到 Heroku。
要在本地构建和安装，我运行以下命令：
go install -v -tags heroku .
这有效并输出
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/BurntSushi/toml
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/fatih/structs
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/cache/cfg
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/cache/ruleset
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/pio/terminal
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/iris-contrib/form-binder
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/json-iterator/go
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/satori/go.uuid
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/klauspost/cpuid
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/klauspost/crc32
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/pio
github.com/VaccinalBowl/herokulunchhelper/vendor/golang.org/x/net/html/atom
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/shurcooL/sanitized_anchor_name
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/errors
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/russross/blackfriday
github.com/VaccinalBowl/herokulunchhelper/vendor/golang.org/x/net/html
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/cache/entry
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/klauspost/compress/flate
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/golog
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/cache/uri
github.com/VaccinalBowl/herokulunchhelper/vendor/golang.org/x/crypto/acme
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/router/macro/interpreter/ast
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/router/macro/interpreter/token
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/router/macro/interpreter/lexer
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/router/macro/interpreter/parser
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/mvc/activator/field
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/mvc/activator/persistence
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/router/macro
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/ryanuber/columnize
github.com/VaccinalBowl/herokulunchhelper/vendor/golang.org/x/crypto/acme/autocert
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/Joker/jade
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/klauspost/compress/gzip
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/aymerick/raymond/ast
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/aymerick/raymond/lexer
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/eknkc/amber/parser
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/juju/errors
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/microcosm-cc/bluemonday
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/memstore
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/aymerick/raymond/parser
github.com/VaccinalBowl/herokulunchhelper/vendor/gopkg.in/yaml.v2
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/flosch/pongo2
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/aymerick/raymond
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/netutil
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/host
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/eknkc/amber
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/context
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/cache/client/rule
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/handlerconv
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/mvc/activator/methodfunc
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/router/node
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/mvc/activator/model
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/middleware/logger
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/middleware/recover
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/sessions
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/cache/client
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/view
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/mvc/activator
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/cache
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/router
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/mvc
github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris
github.com/VaccinalBowl/herokulunchhelper
此应用程序将在本地运行而不会出现问题。但是，当我使用以下命令部署到 Heroku 时：
git push heroku master
以下是输出：
remote: Compressing source files... done.
remote: Building source:
remote:
remote: -----> Go app detected
remote: -----> Checking vendor/vendor.json file.
remote: -----> Using go1.8.3
remote: -----> Fetching any unsaved dependencies (govendor sync)
remote: -----> Running: go install -v -tags heroku .
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/BurntSushi/toml
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/pio/terminal
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/pio
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/golog
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/cache/cfg
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/cache/ruleset
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/fatih/structs
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/iris-contrib/form-binder
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/json-iterator/go
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/satori/go.uuid
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/errors
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/memstore
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/klauspost/cpuid
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/klauspost/compress/flate
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/klauspost/crc32
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/klauspost/compress/gzip
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/golang.org/x/net/html/atom
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/golang.org/x/net/html
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/shurcooL/sanitized_anchor_name
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/russross/blackfriday
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/microcosm-cc/bluemonday
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/cache/entry
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/context
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/cache/uri
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/golang.org/x/crypto/acme
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/golang.org/x/crypto/acme/autocert
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/cache/client/rule
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/cache/client
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/handlerconv
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/netutil
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/cache
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/router/macro/interpreter/ast
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/router/macro/interpreter/token
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/router/macro/interpreter/lexer
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/router/macro/interpreter/parser
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/host
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/router/macro
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/router/node
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/mvc/activator/field
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/mvc/activator/methodfunc
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/mvc/activator/model
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/mvc/activator/persistence
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/ryanuber/columnize
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/mvc/activator
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/middleware/logger
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/middleware/recover
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/core/router
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/Joker/jade
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/aymerick/raymond/ast
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/aymerick/raymond/lexer
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/aymerick/raymond/parser
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/eknkc/amber/parser
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/aymerick/raymond
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/eknkc/amber
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/juju/errors
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/gopkg.in/yaml.v2
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/flosch/pongo2
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris/view
remote: github.com/VaccinalBowl/herokulunchhelper/vendor/github.com/kataras/iris
remote: github.com/VaccinalBowl/herokulunchhelper
remote: # github.com/VaccinalBowl/herokulunchhelper
remote: ./main.go:19: undefined: iris.Context
remote: ./main.go:28: undefined: iris.Context
我正在使用 govendor，所需的所有文件都位于我的应用程序的供应商目录中。我使用以下方法添加了它们：
govendor add github.com/kataras/iris
govendor add +external
问题是什么？有人有什么想法吗？