diff --git a/src/r-apt/devcontainer-feature.json b/src/r-apt/devcontainer-feature.json
index c87e0a70..495685a6 100644
--- a/src/r-apt/devcontainer-feature.json
+++ b/src/r-apt/devcontainer-feature.json
@@ -1,7 +1,7 @@
 {
 	"name": "R (via apt)",
 	"id": "r-apt",
-	"version": "0.4.2",
+	"version": "0.5.0",
 	"description": "Installs the latest R, some R packages, and needed dependencies. Note: May require source code compilation for some R packages.",
 	"documentationURL": "https://github.com/rocker-org/devcontainer-features/tree/main/src/r-apt",
 	"options": {
diff --git a/src/r-apt/install.sh b/src/r-apt/install.sh
index bc10f7b9..ff302b2e 100755
--- a/src/r-apt/install.sh
+++ b/src/r-apt/install.sh
@@ -38,18 +38,6 @@ if [ "${architecture}" != "amd64" ] && [ "${architecture}" != "arm64" ]; then
     exit 1
 fi
 
-# Only debian testing supports arm64
-# shellcheck source=/dev/null
-source /etc/os-release
-if [ "${ID}" = "ubuntu" ] && [ "${architecture}" != "amd64" ]; then
-    echo "(!) Ubuntu $architecture unsupported"
-    exit 1
-fi
-if [ "${ID}" = "debian" ] && [ "${architecture}" != "amd64" ] && [ "${USE_TESTING}" != "true" ]; then
-    echo "(!) To use Debian $architecture, please set useTesting option to true"
-    exit 1
-fi
-
 # Determine the appropriate non-root user
 if [ "${USERNAME}" = "auto" ] || [ "${USERNAME}" = "automatic" ]; then
     USERNAME=""
@@ -144,13 +132,15 @@ usermod -a -G staff "${USERNAME}"
 
 check_packages curl ca-certificates
 
+# shellcheck source=/dev/null
+source /etc/os-release
 if [ "${ID}" = "ubuntu" ]; then
     echo "Set up for Ubuntu..."
     curl -fsSL https://cloud.r-project.org/bin/linux/ubuntu/marutter_pubkey.asc | tee -a /etc/apt/trusted.gpg.d/cran_ubuntu_key.asc >/dev/null
-    echo "deb [arch=amd64] https://cloud.r-project.org/bin/linux/ubuntu ${UBUNTU_CODENAME}-cran40/" >/etc/apt/sources.list.d/cran-ubuntu.list
+    echo "deb https://cloud.r-project.org/bin/linux/ubuntu ${UBUNTU_CODENAME}-cran40/" >/etc/apt/sources.list.d/cran-ubuntu.list
     echo "Set up r2u..."
     curl -fsSL https://eddelbuettel.github.io/r2u/assets/dirk_eddelbuettel_key.asc | tee -a /etc/apt/trusted.gpg.d/cranapt_key.asc >/dev/null
-    echo "deb [arch=amd64] https://r2u.stat.illinois.edu/ubuntu ${UBUNTU_CODENAME} main" >/etc/apt/sources.list.d/cranapt.list
+    echo "deb https://r2u.stat.illinois.edu/ubuntu ${UBUNTU_CODENAME} main" >/etc/apt/sources.list.d/cranapt.list
     # Pinning
     cat <<EOF >"/etc/apt/preferences.d/99cranapt"
 Package: *
@@ -167,7 +157,7 @@ elif [ "${ID}" = "debian" ]; then
     else
         echo "Set up for Debian ${VERSION_CODENAME}..."
         curl -fsSL "https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x95c0faf38db3ccad0c080a7bdc78b2ddeabc47b7" | tee -a /etc/apt/trusted.gpg.d/cran_debian_key.asc >/dev/null
-        echo "deb [arch=amd64] http://cloud.r-project.org/bin/linux/debian ${VERSION_CODENAME}-cran40/" >/etc/apt/sources.list.d/cran-debian.list
+        echo "deb http://cloud.r-project.org/bin/linux/debian ${VERSION_CODENAME}-cran40/" >/etc/apt/sources.list.d/cran-debian.list
     fi
     # On Debian, renv, languageserver and httpgd are not available via apt
     # shellcheck disable=SC2206
@@ -176,6 +166,10 @@ elif [ "${ID}" = "debian" ]; then
     APT_PACKAGES=(${APT_PACKAGES[@]/r-cran-languageserver})
     # shellcheck disable=SC2206
     APT_PACKAGES=(${APT_PACKAGES[@]/r-cran-httpgd})
+else
+    echo "(!) Unsupported distribution: ${ID}"
+    echo "    This script is designed only for Debian and Ubuntu."
+    exit 1
 fi
 
 apt-get update -y
diff --git a/test/r-apt/scenarios.json b/test/r-apt/scenarios.json
index 229c7418..12288e5b 100644
--- a/test/r-apt/scenarios.json
+++ b/test/r-apt/scenarios.json
@@ -41,21 +41,22 @@
 			}
 		}
 	},
-	"all-on-not-testing": {
-		"image": "debian:stable-slim",
-		"features": {
-			"r-apt": {
-				"useTesting": false,
-				"vscodeRSupport": "full",
-				"installDevTools": true,
-				"installREnv": true,
-				"installRMarkdown": true,
-				"installVscDebugger": true,
-				"installJupyterlab": true,
-				"installRadian": true
-			}
-		}
-	},
+	// TODO: some packages are not available on stable for now
+	// "all-on-not-testing": {
+	// 	"image": "debian:stable-slim",
+	// 	"features": {
+	// 		"r-apt": {
+	// 			"useTesting": false,
+	// 			"vscodeRSupport": "full",
+	// 			"installDevTools": true,
+	// 			"installREnv": true,
+	// 			"installRMarkdown": true,
+	// 			"installVscDebugger": true,
+	// 			"installJupyterlab": true,
+	// 			"installRadian": true
+	// 		}
+	// 	}
+	// },
 	// TODO: enable tesing on debian
 	// "bspm-debian": {
 	// 	"image": "mcr.microsoft.com/devcontainers/base:debian",