[Nook Color Android Development] Oogy:
trying to build on arch linux 32.. getting this error

host Java: chimpchat (out/host/common/obj/JAVA_LIBRARIES/chimpchat_intermediates/classes)
sdk/chimpchat/src/com/android/chimpchat/core/IChimpDevice.java:26: cannot find symbol
symbol : class Nullable
location: package javax.annotation
import javax.annotation.Nullable;
^
target Dex: apache-xml-hostdex
sdk/chimpchat/src/com/android/chimpchat/core/IChimpDevice.java:61: cannot find symbol
symbol : class Nullable
location: interface com.android.chimpchat.core.IChimpDevice
void reboot(@Nullable String into);
^
sdk/chimpchat/src/com/android/chimpchat/core/IChimpDevice.java:167: cannot find symbol
symbol : class Nullable
location: interface com.android.chimpchat.core.IChimpDevice
void startActivity(@Nullable String uri, @Nullable String action,
^
sdk/chimpchat/src/com/android/chimpchat/core/IChimpDevice.java:167: cannot find symbol
symbol : class Nullable
location: interface com.android.chimpchat.core.IChimpDevice
void startActivity(@Nullable String uri, @Nullable String action,
^
sdk/chimpchat/src/com/android/chimpchat/core/IChimpDevice.java:168: cannot find symbol
symbol : class Nullable
location: interface com.android.chimpchat.core.IChimpDevice
@Nullable String data, @Nullable String mimeType,
^
sdk/chimpchat/src/com/android/chimpchat/core/IChimpDevice.java:168: cannot find symbol
symbol : class Nullable
location: interface com.android.chimpchat.core.IChimpDevice
@Nullable String data, @Nullable String mimeType,
^
sdk/chimpchat/src/com/android/chimpchat/core/IChimpDevice.java:169: cannot find symbol
symbol : class Nullable
location: interface com.android.chimpchat.core.IChimpDevice
Collection<String> categories, Map<String, Object> extras, @Nullable String component,
^
sdk/chimpchat/src/com/android/chimpchat/core/IChimpDevice.java:184: cannot find symbol
symbol : class Nullable
location: interface com.android.chimpchat.core.IChimpDevice
void broadcastIntent(@Nullable String uri, @Nullable String action,
^
sdk/chimpchat/src/com/android/chimpchat/core/IChimpDevice.java:184: cannot find symbol
symbol : class Nullable
location: interface com.android.chimpchat.core.IChimpDevice
void broadcastIntent(@Nullable String uri, @Nullable String action,
^
sdk/chimpchat/src/com/android/chimpchat/core/IChimpDevice.java:185: cannot find symbol
symbol : class Nullable
location: interface com.android.chimpchat.core.IChimpDevice
@Nullable String data, @Nullable String mimeType,
^
sdk/chimpchat/src/com/android/chimpchat/core/IChimpDevice.java:185: cannot find symbol
symbol : class Nullable
location: interface com.android.chimpchat.core.IChimpDevice
@Nullable String data, @Nullable String mimeType,
^
sdk/chimpchat/src/com/android/chimpchat/core/IChimpDevice.java:186: cannot find symbol
symbol : class Nullable
location: interface com.android.chimpchat.core.IChimpDevice
Collection<String> categories, Map<String, Object> extras, @Nullable String component,
^
sdk/chimpchat/src/com/android/chimpchat/adb/AdbChimpDevice.java:402: cannot find symbol
symbol : class Nullable
location: class com.android.chimpchat.adb.AdbChimpDevice
private static boolean isNullOrEmpty(@Nullable String string) {
^
13 errors
make: *** [out/host/common/obj/JAVA_LIBRARIES/chimpchat_intermediates/javalib.jar] Error 41
make: *** Waiting for unfinished jobs....

thoughts? new to this android building stuff.