let provide ~run_program ~host ~install_path it =   let conda_env = get_conda_env install_path it.package in   let install_workflow =     install_tool ~run_program ~host ~install_path it in   let export_var =     match it.tool_type with     | `Application -> None     | `Library v   ->       let path = install_workflow#product#shell_which in       Some KEDSL.Program.(shf "export %s=\"%s${%s:+:}${%s}\"" v path v v)   in   Machine.Tool.create it.definition     ~ensure:install_workflow     ~init:KEDSL.Program.(         (if it.requires_conda          then Conda.init_env ~conda_env ()          else sh "echo 'Does not need Conda'")         && it.init_environment ~install_path         && Opam.kcom ~root_name:(Opam.root_of_package it.package) ~install_path           (shf "eval $(%s)""config env"         && Option.value export_var ~default:(sh "echo 'No export var'")       )