bad config syzkaller param: can't find /syzkaller/jobs-2/netbsd/gopath/src/github.com/google/syzkaller/bin/netbsd_amd64/syz-executor

syzkaller build log:
go env (err=<nil>)
GO111MODULE="auto"
GOARCH="amd64"
GOBIN=""
GOCACHE="/syzkaller/.cache/go-build"
GOENV="/syzkaller/.config/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/syzkaller/jobs-2/netbsd/gopath/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/syzkaller/jobs-2/netbsd/gopath"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.20.1"
GCCGO="gccgo"
GOAMD64="v1"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD=""
GOWORK=""
CGO_CFLAGS="-O2 -g"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-O2 -g"
CGO_FFLAGS="-O2 -g"
CGO_LDFLAGS="-O2 -g"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build4181090225=/tmp/go-build -gno-record-gcc-switches"

git status (err=<nil>)
HEAD detached at 749688d22
nothing to commit, working tree clean


GOOS=netbsd GOARCH=amd64 go install ./syz-fuzzer
make fuzzer execprog stress executor
make[1]: Entering directory '/syzkaller/jobs-2/netbsd/gopath/src/github.com/google/syzkaller'
make[1]: warning: -j32 forced in makefile: resetting jobserver mode.
GOOS=netbsd GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=749688d22abef3f3cb9a0480e15c19a3f2ed8e13 -X 'github.com/google/syzkaller/prog.gitRevisionDate=Fri Mar 13 19:49:29 2020 +0100'" "-tags=syz_target syz_os_netbsd syz_arch_amd64 " -o ./bin/netbsd_amd64/syz-fuzzer github.com/google/syzkaller/syz-fuzzer
GOOS=netbsd GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=749688d22abef3f3cb9a0480e15c19a3f2ed8e13 -X 'github.com/google/syzkaller/prog.gitRevisionDate=Fri Mar 13 19:49:29 2020 +0100'" "-tags=syz_target syz_os_netbsd syz_arch_amd64 " -o ./bin/netbsd_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
GOOS=netbsd GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=749688d22abef3f3cb9a0480e15c19a3f2ed8e13 -X 'github.com/google/syzkaller/prog.gitRevisionDate=Fri Mar 13 19:49:29 2020 +0100'" "-tags=syz_target syz_os_netbsd syz_arch_amd64 " -o ./bin/netbsd_amd64/syz-stress github.com/google/syzkaller/tools/syz-stress
************************************************************************************
Native cross-compiler /../tools/bin/x86_64--netbsd-g++ is missing. Executor will not be built.
************************************************************************************
make[1]: Nothing to be done for 'executor'.
make[1]: Leaving directory '/syzkaller/jobs-2/netbsd/gopath/src/github.com/google/syzkaller'