apktool error

I: Checking whether sources has changed...
I: Checking whether resources has changed...
I: Building resources...
Exception in thread "main" aapt: error while loading shared libraries: libz.so.1: cannot open shared object file: No such file or directory
brut.androlib.AndrolibException: brut.androlib.AndrolibException: brut.common.BrutException: could not exec command: [aapt, p, --min-sdk-version, 8, --target-sdk-version, 16, -F, /tmp/APKTOOL7657701932181555501.tmp, -0, arsc, -I, /home/urbanslug/apktool/framework/1.apk, -S, /home/urbanslug/Downloads/archives/android/apps/apk/hacked/swype/res, -M, /home/urbanslug/Downloads/archives/android/apps/apk/hacked/swype/AndroidManifest.xml]
        at brut.androlib.Androlib.buildResourcesFull(Androlib.java:358)
        at brut.androlib.Androlib.buildResources(Androlib.java:283)
        at brut.androlib.Androlib.build(Androlib.java:206)
        at brut.androlib.Androlib.build(Androlib.java:176)
        at brut.apktool.Main.cmdBuild(Main.java:228)
        at brut.apktool.Main.main(Main.java:79)
Caused by: brut.androlib.AndrolibException: brut.common.BrutException: could not exec command: [aapt, p, --min-sdk-version, 8, --target-sdk-version, 16, -F, /tmp/APKTOOL7657701932181555501.tmp, -0, arsc, -I, /home/urbanslug/apktool/framework/1.apk, -S, /home/urbanslug/Downloads/archives/android/apps/apk/hacked/swype/res, -M, /home/urbanslug/Downloads/archives/android/apps/apk/hacked/swype/AndroidManifest.xml]
        at brut.androlib.res.AndrolibResources.aaptPackage(AndrolibResources.java:357)
        at brut.androlib.Androlib.buildResourcesFull(Androlib.java:336)
        ... 5 more
Caused by: brut.common.BrutException: could not exec command: [aapt, p, --min-sdk-version, 8, --target-sdk-version, 16, -F, /tmp/APKTOOL7657701932181555501.tmp, -0, arsc, -I, /home/urbanslug/apktool/framework/1.apk, -S, /home/urbanslug/Downloads/archives/android/apps/apk/hacked/swype/res, -M, /home/urbanslug/Downloads/archives/android/apps/apk/hacked/swype/AndroidManifest.xml]
        at brut.util.OS.exec(OS.java:89)
        at brut.androlib.res.AndrolibResources.aaptPackage(AndrolibResources.java:355)
        ... 6 more