I'm following the tutorial on https://github.com/alexander-yakushev/lein-droid/wiki/Tutorial, but when I execute "lein droid build" (or even just "lein droid compile"), I get the following error:

Compiling neko.activity
Exception in thread "main" java.lang.ClassNotFoundException: android.app.Activity, compiling:(activity.clj:12)
at clojure.lang.Compiler$InvokeExpr.eval(Compiler.java:3387)
at clojure.lang.Compiler.compile1(Compiler.java:7035)
at clojure.lang.Compiler.compile1(Compiler.java:7025)
at clojure.lang.Compiler.compile(Compiler.java:7097)
at clojure.lang.RT.compile(RT.java:412)
at clojure.lang.RT.load(RT.java:452)
at clojure.lang.RT.load(RT.java:425)
at clojure.core$load$fn__4890.invoke(core.clj:5415)
at clojure.core$load.doInvoke(core.clj:5414)
at clojure.lang.RestFn.invoke(RestFn.java:408)
at clojure.core$load_one.invoke(core.clj:5227)
at clojure.core$compile$fn__4895.invoke(core.clj:5426)
at clojure.core$compile.invoke(core.clj:5425)
at user$eval31.invoke(NO_SOURCE_FILE:1)
at clojure.lang.Compiler.eval(Compiler.java:6511)
at clojure.lang.Compiler.eval(Compiler.java:6501)
at clojure.lang.Compiler.eval(Compiler.java:6477)
at clojure.core$eval.invoke(core.clj:2797)
at clojure.main$eval_opt.invoke(main.clj:302)
at clojure.main$initialize.invoke(main.clj:321)
at clojure.main$null_opt.invoke(main.clj:354)
at clojure.main$main.doInvoke(main.clj:432)
at clojure.lang.RestFn.invoke(RestFn.java:421)
at clojure.lang.Var.invoke(Var.java:419)
at clojure.lang.AFn.applyToHelper(AFn.java:163)
at clojure.lang.Var.applyTo(Var.java:532)
at clojure.main.main(main.java:37)
Caused by: java.lang.ClassNotFoundException: android.app.Activity
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at clojure.lang.DynamicClassLoader.findClass(DynamicClassLoader.java:65)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at neko.activity$loading__4784__auto__.invoke(activity.clj:12)
at clojure.lang.AFn.applyToHelper(AFn.java:159)
at clojure.lang.AFn.applyTo(AFn.java:151)
at clojure.lang.Compiler$InvokeExpr.eval(Compiler.java:3382)
... 26 more
Compilation failed.

The complete output from the first time I issue the build command (which also shows what gets downloaded etc) is included below. If you have any ideas why this fails, fixes or workarounds please share!

$ lein droid build
Could not find artifact lein-droid:lein-droid:pom:0.0.1 in central (http://repo1.maven.org/maven2)
Retrieving lein-droid/lein-droid/0.0.1/lein-droid-0.0.1.pom (3k)
from http://clojars.org/repo/
Could not find artifact robert:hooke:pom:1.1.2 in central (http://repo1.maven.org/maven2)
Retrieving robert/hooke/1.1.2/hooke-1.1.2.pom (2k)from http://clojars.org/repo/
Retrieving org/clojure/data.zip/0.1.0/data.zip-0.1.0.pom
from http://repo1.maven.org/maven2/
Retrieving org/clojure/pom.contrib/0.0.23/pom.contrib-0.0.23.pom
from http://repo1.maven.org/maven2/
Retrieving org/sonatype/oss/oss-parent/5/oss-parent-5.pom
from http://repo1.maven.org/maven2/
Retrieving org/clojure/clojure/1.3.0-beta1/clojure-1.3.0-beta1.pom
from http://repo1.maven.org/maven2/
Could not find artifact lein-newnew:lein-newnew:pom:0.3.1 in central (http://repo1.maven.org/maven2)
Retrieving lein-newnew/lein-newnew/0.3.1/lein-newnew-0.3.1.pom (2k)
from http://clojars.org/repo/
Could not find artifact stencil:stencil:pom:0.2.0 in central (http://repo1.maven.org/maven2)
Retrieving stencil/stencil/0.2.0/stencil-0.2.0.pom (2k)
from http://clojars.org/repo/
Retrieving org/clojure/clojure/1.3.0/clojure-1.3.0.pom
from http://repo1.maven.org/maven2/
Could not find artifact slingshot:slingshot:pom:0.8.0 in central (http://repo1.maven.org/maven2)
Retrieving slingshot/slingshot/0.8.0/slingshot-0.8.0.pom (1k)
from http://clojars.org/repo/
Retrieving org/clojure/clojure/1.2.1/clojure-1.2.1.pom
from http://repo1.maven.org/maven2/
Could not find artifact bultitude:bultitude:pom:0.1.5 in central (http://repo1.maven.org/maven2)
Retrieving bultitude/bultitude/0.1.5/bultitude-0.1.5.pom (2k)
from http://clojars.org/repo/
Retrieving org/clojure/data.zip/0.1.0/data.zip-0.1.0.jar
from http://repo1.maven.org/maven2/
Could not find artifact robert:hooke:jar:1.1.2 in central (http://repo1.maven.org/maven2)
Could not find artifact lein-droid:lein-droid:jar:0.0.1 in central (http://repo1.maven.org/maven2)
Could not find artifact lein-newnew:lein-newnew:jar:0.3.1 in central (http://repo1.maven.org/maven2)
Retrieving org/clojure/clojure/1.3.0-beta1/clojure-1.3.0-beta1.jar
from http://repo1.maven.org/maven2/
Could not find artifact stencil:stencil:jar:0.2.0 in central (http://repo1.maven.org/maven2)
Could not find artifact slingshot:slingshot:jar:0.8.0 in central (http://repo1.maven.org/maven2)
Could not find artifact bultitude:bultitude:jar:0.1.5 in central (http://repo1.maven.org/maven2)
Retrieving lein-droid/lein-droid/0.0.1/lein-droid-0.0.1.jar (25k)
from http://clojars.org/repo/
Retrieving lein-newnew/lein-newnew/0.3.1/lein-newnew-0.3.1.jar (11k)
from http://clojars.org/repo/
Retrieving stencil/stencil/0.2.0/stencil-0.2.0.jar (16k)
from http://clojars.org/repo/
Retrieving robert/hooke/1.1.2/hooke-1.1.2.jar (3k)from http://clojars.org/repo/
Retrieving slingshot/slingshot/0.8.0/slingshot-0.8.0.jar (6k)
from http://clojars.org/repo/
Retrieving bultitude/bultitude/0.1.5/bultitude-0.1.5.jar (3k)
from http://clojars.org/repo/
Retrieving org/clojure/tools.nrepl/0.2.0-beta6/tools.nrepl-0.2.0-beta6.pom
from http://repo1.maven.org/maven2/
Retrieving org/clojure/pom.contrib/0.0.25/pom.contrib-0.0.25.pom
from http://repo1.maven.org/maven2/
Retrieving org/clojure/clojure/1.2.0/clojure-1.2.0.pom
from http://repo1.maven.org/maven2/
Could not find artifact android:clojure:pom:1.4.0 in central (http://repo1.maven.org/maven2)
Retrieving android/clojure/1.4.0/clojure-1.4.0.pom (2k)
from http://clojars.org/repo/
Could not find metadata neko:neko:1.0.1-SNAPSHOT/maven-metadata.xml in central (http://repo1.maven.org/maven2)
Retrieving neko/neko/1.0.1-SNAPSHOT/maven-metadata.xml (1k)
from http://clojars.org/repo/
Could not find artifact neko:neko:pom:1.0.1-20120523.214927-1 in central (http://repo1.maven.org/maven2)
Retrieving neko/neko/1.0.1-SNAPSHOT/neko-1.0.1-20120523.214927-1.pom (3k)
from http://clojars.org/repo/
Could not find artifact android:clojure:jar:1.4.0 in central (http://repo1.maven.org/maven2)
Retrieving org/clojure/tools.nrepl/0.2.0-beta6/tools.nrepl-0.2.0-beta6.jar
from http://repo1.maven.org/maven2/
Retrieving org/clojure/clojure/1.2.0/clojure-1.2.0.jar
from http://repo1.maven.org/maven2/
Retrieving android/clojure/1.4.0/clojure-1.4.0.jar (4070k)
from http://clojars.org/repo/
Retrieving neko/neko/1.0.1-SNAPSHOT/neko-1.0.1-20120523.214927-1.jar (23k)
from http://clojars.org/repo/
Compiling neko.activity
Exception in thread "main" java.lang.ClassNotFoundException: android.app.Activity, compiling:(activity.clj:12)
at clojure.lang.Compiler$InvokeExpr.eval(Compiler.java:3387)
at clojure.lang.Compiler.compile1(Compiler.java:7035)
at clojure.lang.Compiler.compile1(Compiler.java:7025)
at clojure.lang.Compiler.compile(Compiler.java:7097)
at clojure.lang.RT.compile(RT.java:412)
at clojure.lang.RT.load(RT.java:452)
at clojure.lang.RT.load(RT.java:425)
at clojure.core$load$fn__4890.invoke(core.clj:5415)
at clojure.core$load.doInvoke(core.clj:5414)
at clojure.lang.RestFn.invoke(RestFn.java:408)
at clojure.core$load_one.invoke(core.clj:5227)
at clojure.core$compile$fn__4895.invoke(core.clj:5426)
at clojure.core$compile.invoke(core.clj:5425)
at user$eval31.invoke(NO_SOURCE_FILE:1)
at clojure.lang.Compiler.eval(Compiler.java:6511)
at clojure.lang.Compiler.eval(Compiler.java:6501)
at clojure.lang.Compiler.eval(Compiler.java:6477)
at clojure.core$eval.invoke(core.clj:2797)
at clojure.main$eval_opt.invoke(main.clj:302)
at clojure.main$initialize.invoke(main.clj:321)
at clojure.main$null_opt.invoke(main.clj:354)
at clojure.main$main.doInvoke(main.clj:432)
at clojure.lang.RestFn.invoke(RestFn.java:421)
at clojure.lang.Var.invoke(Var.java:419)
at clojure.lang.AFn.applyToHelper(AFn.java:163)
at clojure.lang.Var.applyTo(Var.java:532)
at clojure.main.main(main.java:37)
Caused by: java.lang.ClassNotFoundException: android.app.Activity
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at clojure.lang.DynamicClassLoader.findClass(DynamicClassLoader.java:65)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at neko.activity$loading__4784__auto__.invoke(activity.clj:12)
at clojure.lang.AFn.applyToHelper(AFn.java:159)
at clojure.lang.AFn.applyTo(AFn.java:151)
at clojure.lang.Compiler$InvokeExpr.eval(Compiler.java:3382)
... 26 more
Compilation failed.

In build_support/clojure.xml I had to change "android.target.classpath" to "project.target.class.path" and "project.libraries.jars" to "project.all.jars.path".