$ go install github.com/aclements/perflock/cmd/perflock@latest
# github.com/aclements/perflock/cmd/perflock
../go/pkg/mod/github.com/aclements/perflock@v0.0.0-20180319185109-8402f33a418d/cmd/perflock/creds.go:17:11: undefined: syscall.Ucred
../go/pkg/mod/github.com/aclements/perflock@v0.0.0-20180319185109-8402f33a418d/cmd/perflock/creds.go:18:13: undefined: syscall.UnixCredentials
../go/pkg/mod/github.com/aclements/perflock@v0.0.0-20180319185109-8402f33a418d/cmd/perflock/creds.go:33:41: undefined: syscall.Ucred
../go/pkg/mod/github.com/aclements/perflock@v0.0.0-20180319185109-8402f33a418d/cmd/perflock/creds.go:39:63: undefined: syscall.SO_PASSCRED
../go/pkg/mod/github.com/aclements/perflock@v0.0.0-20180319185109-8402f33a418d/cmd/perflock/creds.go:64:9: undefined: syscall.ParseUnixCredentials
$ go version
go1.17.3 darwin/amd64
go env Output
$ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/inanc/Library/Caches/go-build"
GOENV="/Users/inanc/Library/Application Support/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/inanc/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/inanc/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GOVCS=""
GOVERSION="go1.17.3"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/dev/null"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/_6/qrn7dct90s7dzyd09v4w26zm0000gn/T/go-build3084434544=/tmp/go-build -gno-record-gcc-switches -fno-common"
