diff --git a/frostwire-jlibtorrent/swig/build-android-arm.sh b/frostwire-jlibtorrent/swig/build-android-arm.sh
index 2ade552..35200f6 100755
--- a/frostwire-jlibtorrent/swig/build-android-arm.sh
+++ b/frostwire-jlibtorrent/swig/build-android-arm.sh
@@ -17,7 +17,6 @@ prepare_android_toolchain
 abort_if_var_unset "ANDROID_TOOLCHAIN" ${ANDROID_TOOLCHAIN}
 export CC=${ANDROID_TOOLCHAIN}/bin/armv7a-linux-androideabi${android_api}-clang
 export run_openssl_configure="./Configure linux-${os_arch}v4 ${OPENSSL_NO_OPTS} -march=armv7-a -mfpu=neon -fPIC --prefix=${OPENSSL_ROOT}";
-mkdir -p bin/release/${os_build}/${os_arch}eabi-v7a
 export run_readelf="${ANDROID_TOOLCHAIN}/bin/arm-linux-androideabi-readelf -d bin/release/${os_build}/${os_arch}eabi-v7a/${SHARED_LIB}"
 export run_bjam="${BOOST_ROOT}/b2 -j8 --user-config=config/${os_build}-${os_arch}-config.jam variant=release toolset=clang-linux-${os_arch} target-os=${os_build} location=bin/release/${os_build}/${os_arch}eabi-v7a"
 export run_strip="${ANDROID_TOOLCHAIN}/bin/arm-linux-androideabi-strip --strip-unneeded -x -g bin/release/${os_build}/${os_arch}eabi-v7a/${SHARED_LIB}"
diff --git a/frostwire-jlibtorrent/swig/build-android-arm64.sh b/frostwire-jlibtorrent/swig/build-android-arm64.sh
index 3950e61..cd2d513 100755
--- a/frostwire-jlibtorrent/swig/build-android-arm64.sh
+++ b/frostwire-jlibtorrent/swig/build-android-arm64.sh
@@ -16,7 +16,6 @@ export NDK_VERSION=r21d
 prepare_android_toolchain
 abort_if_var_unset "ANDROID_TOOLCHAIN" ${ANDROID_TOOLCHAIN}
 export CC=${ANDROID_TOOLCHAIN}/bin/aarch64-linux-android${android_api}-clang
-mkdir -p bin/release/${os_build}/${os_arch}-v8a
 export run_openssl_configure="./Configure linux-aarch64 ${OPENSSL_NO_OPTS} -march=armv8-a+crypto -mfpu=neon -fPIC --prefix=${OPENSSL_ROOT}";
 export run_readelf="${ANDROID_TOOLCHAIN}/bin/aarch64-linux-android-readelf -d bin/release/${os_build}/${os_arch}-v8a/${SHARED_LIB}"
 export run_bjam="${BOOST_ROOT}/b2 -j8 --user-config=config/${os_build}-${os_arch}-config.jam variant=release toolset=clang-${os_arch} target-os=${os_build} location=bin/release/${os_build}/${os_arch}-v8a"
diff --git a/frostwire-jlibtorrent/swig/build-android-x86.sh b/frostwire-jlibtorrent/swig/build-android-x86.sh
index 0377ea8..e8c4035 100755
--- a/frostwire-jlibtorrent/swig/build-android-x86.sh
+++ b/frostwire-jlibtorrent/swig/build-android-x86.sh
@@ -15,7 +15,6 @@ export CXX=g++
 export NDK_VERSION=r21d
 prepare_android_toolchain
 abort_if_var_unset "ANDROID_TOOLCHAIN" ${ANDROID_TOOLCHAIN}
-mkdir -p bin/release/${os_build}/${os_arch}
 export run_openssl_configure="./Configure linux-elf ${OPENSSL_NO_OPTS} -fPIC -mstackrealign --prefix=${OPENSSL_ROOT}"
 export run_readelf="${ANDROID_TOOLCHAIN}/bin/i686-linux-android-readelf -d bin/release/${os_build}/${os_arch}/${SHARED_LIB}"
 export run_bjam="${BOOST_ROOT}/b2 -j8 -q --debug-building --user-config=config/${os_build}-${os_arch}-config.jam variant=release toolset=clang-${os_arch} target-os=${os_build} location=bin/release/${os_build}/${os_arch}"
diff --git a/frostwire-jlibtorrent/swig/build-android-x86_64.sh b/frostwire-jlibtorrent/swig/build-android-x86_64.sh
index 6dfaa91..7767c56 100755
--- a/frostwire-jlibtorrent/swig/build-android-x86_64.sh
+++ b/frostwire-jlibtorrent/swig/build-android-x86_64.sh
@@ -15,7 +15,6 @@ export CXX=g++
 export NDK_VERSION=r21d
 prepare_android_toolchain
 abort_if_var_unset "ANDROID_TOOLCHAIN" ${ANDROID_TOOLCHAIN}
-mkdir -p bin/release/${os_build}/${os_arch}
 export run_openssl_configure="./Configure linux-x86_64 ${OPENSSL_NO_OPTS} -fPIC -mstackrealign --prefix=${OPENSSL_ROOT}";
 export run_readelf="${ANDROID_TOOLCHAIN}/bin/i686-linux-android-readelf -d bin/release/${os_build}/${os_arch}/${SHARED_LIB}"
 export run_bjam="${BOOST_ROOT}/b2 -j8 --user-config=config/${os_build}-${os_arch}-config.jam variant=release toolset=clang-${os_arch} target-os=${os_build} location=bin/release/${os_build}/${os_arch}"
diff --git a/frostwire-jlibtorrent/swig/build-utils.shinc b/frostwire-jlibtorrent/swig/build-utils.shinc
index 52c458d..5fbbdb1 100644
--- a/frostwire-jlibtorrent/swig/build-utils.shinc
+++ b/frostwire-jlibtorrent/swig/build-utils.shinc
@@ -231,6 +231,7 @@ build_libraries() {
   export LIBTORRENT_ROOT=${LIBTORRENT_ROOT}
   export BOOST_ROOT=${BOOST_ROOT}
   export BOOST_BUILD_PATH=${BOOST_ROOT}
+  make clean
   $run_bjam
   $run_objcopy
   $run_strip