diff --git a/README.android b/README.android
index ff083227..dcd13f76 100644
--- a/README.android
+++ b/README.android
@@ -45,14 +45,11 @@ Prerequisites (needs root):
 
 Build with 'python-for-android' (as user):
 
-  Use the repo or an unpacked distribution tarball.
-
-  $ python setup.py install
-  $ make dist  (if using the repo)
+  Use the cloned repo or an unpacked distribution tarball.
 
   go to the android directory, then
 
-  $ ./mkp4a.init [<sdkdir>] [<ndkdir>]        # prepare sdk and p4a installation
+  $ ./mkp4a.init                              # prepare sdk and p4a installation
   $ ./mkkeystore                              # if you want to build a release version.
 
   $ ./mkp4a.debug                             # build debug apk
diff --git a/android/mkp4a.init b/android/mkp4a.init
index 2574ffd6..d3bed62b 100755
--- a/android/mkp4a.init
+++ b/android/mkp4a.init
@@ -3,17 +3,25 @@ set -eux
 
 . mkp4a.common
 
+# NOTE: $1 will be set with fdroid builds only.
+
 echo '### prepare sdk'
 
-./initsdk
+if [[ $# == 0 ]]
+then
+  ./initsdk
+fi
 
 echo '### install p4a'
 
-python3 -m pip install -q --user python-for-android
+if [[ $# == 0 ]]
+then
+  python3 -m pip install -q --user python-for-android
+fi
 
 echo '### prepare source'
 
-(cd .. && make rules)
+(cd .. && make rules && make all_games_html && make mo)
 
 mkdir -p ${tmpdir}
 rm -rf ${tmpdir}
diff --git a/android/mkp4a.preload b/android/mkp4a.preload
new file mode 100755
index 00000000..8fea9bdb
--- /dev/null
+++ b/android/mkp4a.preload
@@ -0,0 +1,27 @@
+#!/bin/bash
+
+# package preload helper for fdroid build.
+
+set -eux
+
+if [[ $# < 3 ]]
+then
+  exit 1
+fi
+
+packagebase=${HOME}'/.local/share/python-for-android/packages'
+
+packagedir=${packagebase}/$1
+packageurl=$2
+packagename=$3
+packagemark='.mark-'${packagename}
+
+if [[ $# == 4 ]]
+then
+  packagemark='.mark'$4
+fi
+
+mkdir -p ${packagedir}
+cd ${packagedir}
+wget -nv ${packageurl}/${packagename}
+touch ${packagemark}
diff --git a/android/mkp4a.unsigned b/android/mkp4a.unsigned
index 845ef729..2c19f66c 100755
--- a/android/mkp4a.unsigned
+++ b/android/mkp4a.unsigned
@@ -3,8 +3,18 @@ set -eux
 
 . mkp4a.common
 
+# NOTE: $1 and $2 (sdk and ndk) used with fdroid build only.
+
+if [[ $# == 2 ]]
+then
+  sdkdir=$1
+  ndkdir=$2
+fi
+
 python3 -m pythonforandroid.toolchain apk \
   ${p4a_options} \
+  --sdk-dir ${sdkdir} \
+  --ndk-dir ${ndkdir} \
   --release
 
 # python3 -m pythonforandroid.toolchain apk