doc/bugs/Android_build_missing_webapp.mdwn

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+### Please describe the problem.
+
+Setting git-annex on an Android device (either the released version, or the autobuilder apk), I'm told:
+
+[[!format sh """
+git-annex: unknown command webapp
+"""]]
+
+Looking in the logs on the Android autobuilder I see many instances of:
+
+[[!format sh """
+#warning Building without the webapp. You probably need to install Yesod..
+"""]]
+
+### What steps will reproduce the problem?
+
+Run git-annex.
+
+### What version of git-annex are you using? On what operating system?
+
+v5.20150617~g031b85a
+
+### Please provide any additional information below.
+
+[[!format sh """
+# If you can, paste a complete transcript of the problem occurring here.
+# If the problem is with the git-annex assistant, paste in .git/annex/daemon.log
+
+
+# End of transcript or log.
+"""]]