Terminal Can'；t使用AppleScript解压文件

我正在尝试制作一个AppleScript，它使用变量将文件下载到下载文件夹

set downboadFolder to (path to downloads folder) & "Technic-Launcher-OSX.zip" as text
set downloadFolder to downboadFolder as alias
#I downloaded Technic-Launcher-OSX.zip earlier in the code and that works

然后我使用这个代码

tell application "Finder"
    try
        move downloadFolder to targetFolder
    end try
end tell

要将文件移动到目标文件夹，请执行以下操作：

try
  set targetFolder to (choose folder)
end try

我用这个来完成代码

set targetFoldera to targetFolder & "Technic-Launcher-OSX.zip" as text
set targetFolderb to targetFoldera as alias
do shell script "/usr/bin/unzip -d /" & (targetFolder) & " " & targetFolderb

这应该将foldera设置为/thefoldertheychoose/TechnicLaunchesOSX.zip 然后将folderb设置为foldera作为别名 然后将文件解压缩到他们选择的文件夹中 当我运行它时，我得到了这个

unzip:  cannot find or open HD:Users:username:Documents:,     HD:Users:myusername:Documents:.zip or HD:Users:usnername:Documents:.ZIP." number 9
#I chose Documents as the folder

尝试：

set downboadFolder to (path to downloads folder as text) & "Technic-Launcher-OSX.zip"
set targetFolder to (choose folder)
tell application "Finder" to set targetFile to move downboadFolder to targetFolder
set {targetFile, targetFolder} to {(targetFile as alias)'s POSIX path, targetFolder's POSIX path}
do shell script "cd " & quoted form of targetFolder & " ; /usr/bin/unzip " & quoted form of targetFile