diff --git a/android/external/Makefile b/android/external/Makefile
index 6ff5f38..6962a34 100644
--- a/android/external/Makefile
+++ b/android/external/Makefile
@@ -19,7 +19,7 @@ ifdef BUILD_CONFIG
     $(info ================================================)
 endif
 
-.PHONY: all build clean
+.PHONY: all build clean clean-all
 
 all: build
 
@@ -31,6 +31,11 @@ clean:
 	$(MAKE) -C armeabi-v7a clean
 	$(MAKE) -C arm64-v8a clean
 
+clean-all:
+	$(MAKE) -C common clean
+	$(MAKE) -C armeabi-v7a clean-all
+	$(MAKE) -C arm64-v8a clean-all
+
 libiconv-1.15.tar.gz:
 	$(MAKE) -C common
 
diff --git a/android/external/arm64-v8a/Makefile b/android/external/arm64-v8a/Makefile
index c901a7d..f3c943c 100644
--- a/android/external/arm64-v8a/Makefile
+++ b/android/external/arm64-v8a/Makefile
@@ -139,7 +139,7 @@ libetpan-cleanzip:
 #------------------------------------------------------------------------------#
 # uuid
 
-uuid.src.stamp: ossp-uuid_1.6.2.orig.tar.gz
+uuid.src.stamp: ../ossp-uuid_1.6.2.orig.tar.gz
 	tar xvfz ../ossp-uuid_1.6.2.orig.tar.gz
 	mv uuid-1.6.2 uuid
 	touch $@
@@ -192,13 +192,8 @@ sequoia-deps-build: gmp-install nettle-install openssl-install
 #------------------------------------------------------------------------------#
 # OpenSSL
 
-openssl-$(OPENSSL_VERSION).tar.gz:
-	wget -nc https://www.openssl.org/source/openssl-$(OPENSSL_VERSION).tar.gz
-	md5sum -c ../openssl-$(OPENSSL_VERSION).tar.gz.md5
-	touch $@
-
-openssl.src.stamp: openssl-$(OPENSSL_VERSION).tar.gz
-	tar xvf openssl-$(OPENSSL_VERSION).tar.gz
+openssl.src.stamp: ../openssl-$(OPENSSL_VERSION).tar.gz
+	tar xvf ../openssl-$(OPENSSL_VERSION).tar.gz
 	mv openssl-$(OPENSSL_VERSION) openssl
 	touch $@
 
@@ -232,13 +227,8 @@ openssl-install: $(LOCAL)/lib/libssl.so
 #------------------------------------------------------------------------------#
 # GMP
 
-gmp-$(GMP_VERSION).tar.bz2:
-	wget -nc https://gmplib.org/download/gmp/gmp-$(GMP_VERSION).tar.bz2
-	md5sum -c ../gmp-$(GMP_VERSION).tar.bz2.md5
-	touch $@
-
-gmp.src.stamp: gmp-$(GMP_VERSION).tar.bz2
-	tar xvf gmp-$(GMP_VERSION).tar.bz2
+gmp.src.stamp: ../gmp-$(GMP_VERSION).tar.bz2
+	tar xvf ../gmp-$(GMP_VERSION).tar.bz2
 	mv gmp-$(GMP_VERSION) gmp
 	touch $@
 
@@ -275,13 +265,8 @@ gmp-install: $(LOCAL)/lib/libgmp.so
 #------------------------------------------------------------------------------#
 # NETTLE
 
-nettle-$(NETTLE_VERSION).tar.gz: $(LOCAL)/lib/libgmp.so
-	wget -nc https://ftp.gnu.org/gnu/nettle/nettle-$(NETTLE_VERSION).tar.gz
-	md5sum -c ../nettle-$(NETTLE_VERSION).tar.gz.md5
-	touch $@
-
-nettle.src.stamp: nettle-$(NETTLE_VERSION).tar.gz
-	tar xvf nettle-$(NETTLE_VERSION).tar.gz
+nettle.src.stamp: ../nettle-$(NETTLE_VERSION).tar.gz $(LOCAL)/lib/libgmp.so
+	tar xvf ../nettle-$(NETTLE_VERSION).tar.gz
 	mv nettle-$(NETTLE_VERSION) nettle
 	touch $@
 
@@ -422,7 +407,7 @@ clean-assets:
 	rm -rf $(ASSETS)
 
 clean-install:
-	rm -rf $(DESTDIR)/data
+	rm -rf $(LOCAL)
 
 clean: $(EXTERNAL_SRCS_CLEAN) clean-assets clean-install libetpan-cleanzip
 
diff --git a/android/external/armeabi-v7a/Makefile b/android/external/armeabi-v7a/Makefile
index 28d4c62..49067d3 100644
--- a/android/external/armeabi-v7a/Makefile
+++ b/android/external/armeabi-v7a/Makefile
@@ -145,7 +145,7 @@ libetpan-cleanzip:
 
 # using released package from debian. official ftp wasn't available today
 
-uuid.src.stamp: ossp-uuid_1.6.2.orig.tar.gz
+uuid.src.stamp: ../ossp-uuid_1.6.2.orig.tar.gz
 	tar xvfz ../ossp-uuid_1.6.2.orig.tar.gz
 	mv uuid-1.6.2 uuid
 	touch $@
@@ -201,13 +201,8 @@ sequoia-deps-build: gmp-install nettle-install openssl-install
 #------------------------------------------------------------------------------#
 # OpenSSL
 
-openssl-$(OPENSSL_VERSION).tar.gz:
-	wget -nc https://www.openssl.org/source/openssl-$(OPENSSL_VERSION).tar.gz
-	md5sum -c ../openssl-$(OPENSSL_VERSION).tar.gz.md5
-	touch $@
-
-openssl.src.stamp: openssl-$(OPENSSL_VERSION).tar.gz
-	tar xvf openssl-$(OPENSSL_VERSION).tar.gz
+openssl.src.stamp: ../openssl-$(OPENSSL_VERSION).tar.gz
+	tar xvf ../openssl-$(OPENSSL_VERSION).tar.gz
 	mv openssl-$(OPENSSL_VERSION) openssl
 	touch $@
 
@@ -242,13 +237,8 @@ openssl-install: $(LOCAL)/lib/libssl.so
 #------------------------------------------------------------------------------#
 # GMP
 
-gmp-$(GMP_VERSION).tar.bz2:
-	wget -nc https://gmplib.org/download/gmp/gmp-$(GMP_VERSION).tar.bz2
-	md5sum -c ../gmp-$(GMP_VERSION).tar.bz2.md5
-	touch $@
-
-gmp.src.stamp: gmp-$(GMP_VERSION).tar.bz2
-	tar xvf gmp-$(GMP_VERSION).tar.bz2
+gmp.src.stamp: ../gmp-$(GMP_VERSION).tar.bz2
+	tar xvf ../gmp-$(GMP_VERSION).tar.bz2
 	mv gmp-$(GMP_VERSION) gmp
 	touch $@
 
@@ -282,13 +272,8 @@ gmp-install: $(LOCAL)/lib/libgmp.so
 #------------------------------------------------------------------------------#
 # NETTLE
 
-nettle-$(NETTLE_VERSION).tar.gz: $(LOCAL)/lib/libgmp.so
-	wget -nc https://ftp.gnu.org/gnu/nettle/nettle-$(NETTLE_VERSION).tar.gz
-	md5sum -c ../nettle-$(NETTLE_VERSION).tar.gz.md5
-	touch $@
-
-nettle.src.stamp: nettle-$(NETTLE_VERSION).tar.gz
-	tar xvf nettle-$(NETTLE_VERSION).tar.gz
+nettle.src.stamp: ../nettle-$(NETTLE_VERSION).tar.gz $(LOCAL)/lib/libgmp.so
+	tar xvf ../nettle-$(NETTLE_VERSION).tar.gz
 	mv nettle-$(NETTLE_VERSION) nettle
 	touch $@
 
@@ -428,7 +413,7 @@ clean-assets:
 	rm -rf $(ASSETS)
 
 clean-install:
-	rm -rf $(DESTDIR)/data
+	rm -rf $(LOCAL)
 
 clean: $(EXTERNAL_SRCS_CLEAN) clean-assets clean-install libetpan-cleanzip
 
diff --git a/android/external/common/Makefile b/android/external/common/Makefile
index 3a29c63..d405578 100644
--- a/android/external/common/Makefile
+++ b/android/external/common/Makefile
@@ -13,12 +13,14 @@ include ../Makefile.conf
 #------------------------------------------------------------------------------#
 # Build parameters
 
-all:  download-iconv download-uuid #build-etpan download sequoia
+all:  download-iconv download-uuid download-sequoia-deps #build-etpan download sequoia
 
 download-iconv: ../libiconv-1.15.tar.gz
 
 download-uuid: ../ossp-uuid_1.6.2.orig.tar.gz
 
+download-sequoia-deps: ../openssl-$(OPENSSL_VERSION).tar.gz ../gmp-$(GMP_VERSION).tar.bz2 ../nettle-$(NETTLE_VERSION).tar.gz
+
 # Download source and patch it
 ../libiconv-1.15.tar.gz:
 	wget https://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.15.tar.gz -P ../
@@ -27,8 +29,25 @@ download-uuid: ../ossp-uuid_1.6.2.orig.tar.gz
 	wget http://http.debian.net/debian/pool/main/o/ossp-uuid/ossp-uuid_1.6.2.orig.tar.gz -P ../
 	cd .. && md5sum -c ossp-uuid_1.6.2.orig.tar.gz.md5
 
+../openssl-$(OPENSSL_VERSION).tar.gz:
+	wget -nc https://www.openssl.org/source/openssl-$(OPENSSL_VERSION).tar.gz -P ../
+	cd .. && md5sum -c openssl-$(OPENSSL_VERSION).tar.gz.md5
+
+../gmp-$(GMP_VERSION).tar.bz2:
+	wget -nc https://gmplib.org/download/gmp/gmp-$(GMP_VERSION).tar.bz2 -P ../
+	cd .. && md5sum -c gmp-$(GMP_VERSION).tar.bz2.md5
+
+../nettle-$(NETTLE_VERSION).tar.gz:
+	wget -nc https://ftp.gnu.org/gnu/nettle/nettle-$(NETTLE_VERSION).tar.gz -P ../
+	cd .. && md5sum -c nettle-$(NETTLE_VERSION).tar.gz.md5
+
+
+
 clean:
 	rm -rf ../libiconv-1.15.tar.gz
 	rm -rf ../ossp-uuid_1.6.2.orig.tar.gz
+	rm -rf ../openssl-$(OPENSSL_VERSION).tar.gz
+	rm -rf ../gmp-$(GMP_VERSION).tar.bz2
+	rm -rf ../nettle-$(NETTLE_VERSION).tar.gz
 
 .PHONY: clean download-iconv download-uuid
\ No newline at end of file