Unfortunately, I am stuck with julia v1.2.0 for now. I’ll ask our IT if they can update their julia version. But your suggestion worked for me. Many thanks!
julia> mktempdir(tempdir())
"/tmp/jl_SXNP1z"
(v1.2) pkg> activate CUDATestProject
Activating new environment at `~/CUDATestProject/Project.toml`
(CUDATestProject) pkg> add BenchmarkTools
Resolving package versions...
Updating `~/CUDATestProject/Project.toml`
[6e4b80f9] + BenchmarkTools v0.4.3
Updating `~/CUDATestProject/Manifest.toml`
[6e4b80f9] + BenchmarkTools v0.4.3
[682c06a0] + JSON v0.21.0
[69de0a69] + Parsers v0.3.8
[2a0f44e3] + Base64
[ade2ca70] + Dates
[8ba89e20] + Distributed
[b77e0a4c] + InteractiveUtils
[8f399da3] + Libdl
[37e2e46d] + LinearAlgebra
[56ddb016] + Logging
[d6f4376e] + Markdown
[a63ad114] + Mmap
[de0858da] + Printf
[9a3f8284] + Random
[9e88b42a] + Serialization
[6462fe0b] + Sockets
[2f01184e] + SparseArrays
[10745b16] + Statistics
[8dfed614] + Test
[4ec0a83e] + Unicode