https://github.com/JuliaCI/BenchmarkTools.jl/blob/255854d004b55410f711bc07f8488ebf4597ad54/src/BenchmarkTools.jl#L12 This is used when saving benchmark results, `const BENCHMARKTOOLS_VERSION = pkgversion(BenchmarkTools)` seems to work for Julia 1.9 and newer.