diff --git a/README.md b/README.md
index 35d0b55..653a72a 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ For a comprehensive introduction to rooms 2.0, watch [this video](https://www.yo
 ## Disclaimers / important information
 
  * requires a full dedicated domain and does not support sub-paths
- * currently ony supported on amd64 architecture (until more binaries are built upstream)
+ * currently ony supports the following architectures: amd64, arm64, arm7
  * ssb rooms work best when the app is in public mode. ssb-room has its own user and authentication system, and doesn't need yunohost SSO
 ## Documentation and resources
 
diff --git a/compile_binaries/cross_compile_ssbroom.py b/compile_binaries/cross_compile_ssbroom.py
index 584d1e0..0093f4f 100644
--- a/compile_binaries/cross_compile_ssbroom.py
+++ b/compile_binaries/cross_compile_ssbroom.py
@@ -3,6 +3,7 @@ script to cross-compile go-ssb-room for arm64 and other architectures
 
 before running, run:
 - sudo apt install gcc-aarch64-linux-gnu
+- sudo apt install gcc-arm-linux-gnueabi
 
 """
 import subprocess
@@ -34,6 +35,18 @@ def crosscompile_go_ssb_room():
                            "GOARCH=arm64", "go", "build", "./cmd/insert-user"], cwd=WORKING_DIR)
     publish(architecture="aarch64")
 
+def crosscompile_go_ssb_room_for_arm7():
+    subprocess.check_call(["git", "pull"], cwd=WORKING_DIR)
+    print("[CROSS-COMPILING for arm7 go-ssb-room/server]")
+    subprocess.check_call(["env", "CGO_ENABLED=1", "CC=arm-linux-gnueabi-gcc",
+                           "GOOS=linux",
+                           "GOARCH=arm", "GOARM=7", "go", "build", "./cmd/server"], cwd=WORKING_DIR)
+    print("[CROSS-COMPILING for arm7 go-ssb-room/insert-user]")
+    subprocess.check_call(["env", "CGO_ENABLED=1", "CC=arm-linux-gnueabi-gcc",
+                           "GOOS=linux",
+                           "GOARCH=arm", "GOARM=7", "go", "build", "./cmd/insert-user"], cwd=WORKING_DIR)
+    publish(architecture="arm7")
+
 def compile_go_ssb_room():
     subprocess.check_call(["git", "pull"], cwd=WORKING_DIR)
     print("[COMPILING go-ssb-room/server for amd64]")
@@ -60,5 +73,6 @@ def publish(architecture):
 
 if __name__ == '__main__':
     pull_repo()
-    crosscompile_go_ssb_room()
-    compile_go_ssb_room()
+    # crosscompile_go_ssb_room()
+    crosscompile_go_ssb_room_for_arm7()
+    # compile_go_ssb_room()
diff --git a/conf/arm7.src b/conf/arm7.src
new file mode 100644
index 0000000..d648c9d
--- /dev/null
+++ b/conf/arm7.src
@@ -0,0 +1,7 @@
+SOURCE_URL=https://files.commoninternet.net/go-ssb-room_2.0.6_Linux_arm7.tar.gz
+SOURCE_SUM=8894b7b21031976e1d79265fefdcef4edb6fde38f34231e8aea4cebcc85a4f88
+SOURCE_SUM_PRG=sha256sum
+SOURCE_FORMAT=tar.gz
+SOURCE_IN_SUBDIR=true
+SOURCE_FILENAME=
+SOURCE_EXTRACT=true
diff --git a/conf/systemd.service b/conf/systemd.service
index 08eb433..2456797 100644
--- a/conf/systemd.service
+++ b/conf/systemd.service
@@ -6,7 +6,7 @@ After=network.target
 Type=simple
 User=__APP__
 Group=__APP__
-WorkingDirectory=__DATADIR__/
+WorkingDirectory=__DATADIR__
 ExecStart=__FINALPATH__/server -repo __DATADIR__/ -lishttp localhost:__PORT__ -https-domain __DOMAIN__ -lismux :__SSBPORT__ -aliases-as-subdomains false
 StandardOutput=append:/var/log/__APP__/__APP__.log
 StandardError=inherit
diff --git a/doc/DISCLAIMER.md b/doc/DISCLAIMER.md
index a80e63e..a05a19f 100644
--- a/doc/DISCLAIMER.md
+++ b/doc/DISCLAIMER.md
@@ -1,3 +1,3 @@
  * requires a full dedicated domain and does not support sub-paths
- * currently ony supported on amd64 architecture (until more binaries are built upstream)
+ * currently ony supports the following architectures: amd64, arm64, arm7
  * ssb rooms work best when the app is in public mode. ssb-room has its own user and authentication system, and doesn't need yunohost SSO
\ No newline at end of file
diff --git a/scripts/install b/scripts/install
index e3b69d2..6814af3 100755
--- a/scripts/install
+++ b/scripts/install
@@ -147,6 +147,15 @@ ynh_script_progression --message="Configuring a systemd service..."  --weight=1
 # Create a dedicated systemd config
 ynh_add_systemd_config
 
+# for yunohost version < 4.2, this is a workaround to replace string variables
+ynh_script_progression --message="String replacing systemd service with $datadir"  --weight=1
+systemd_file="/etc/systemd/system/$app.service"
+ynh_replace_string --match_string=__DATADIR__ --replace_string=$datadir --target_file=$systemd_file
+ynh_replace_string --match_string=__PORT__ --replace_string=$port --target_file=$systemd_file
+ynh_replace_string --match_string=__DOMAIN__ --replace_string=$domain --target_file=$systemd_file
+ynh_replace_string --match_string=__SSBPORT__ --replace_string=$ssbport --target_file=$systemd_file
+systemctl daemon-reload
+
 #=================================================
 # GENERIC FINALIZATION
 #=================================================