diff --git a/src/elixir-asdf/devcontainer-feature.json b/src/elixir-asdf/devcontainer-feature.json
index 8237bcbaf..bbd86ff3a 100644
--- a/src/elixir-asdf/devcontainer-feature.json
+++ b/src/elixir-asdf/devcontainer-feature.json
@@ -1,6 +1,6 @@
 {
     "id": "elixir-asdf",
-    "version": "2.0.18",
+    "version": "2.0.19",
     "name": "Elixir (via asdf)",
     "documentationURL": "http://github.com/devcontainers-contrib/features/tree/main/src/elixir-asdf",
     "description": "Elixir is a functional, concurrent, general-purpose programming language that runs on the BEAM virtual machine which is also used to implement the Erlang programming language.",
diff --git a/src/elixir-asdf/install.sh b/src/elixir-asdf/install.sh
index 4782118d0..1914c51d6 100755
--- a/src/elixir-asdf/install.sh
+++ b/src/elixir-asdf/install.sh
@@ -1,22 +1,21 @@
-#!/bin/bash -i
 
 set -e
 
-source ./library_scripts.sh
+. ./library_scripts.sh
 
 # nanolayer is a cli utility which keeps container layers as small as possible
 # source code: https://github.com/devcontainers-contrib/nanolayer
 # `ensure_nanolayer` is a bash function that will find any existing nanolayer installations, 
 # and if missing - will download a temporary copy that automatically get deleted at the end 
 # of the script
-ensure_nanolayer nanolayer_location "v0.4.45"
+ensure_nanolayer nanolayer_location "v0.5.5"
 
 
 $nanolayer_location \
     install \
     devcontainer-feature \
-    "ghcr.io/devcontainers-contrib/features/apt-get-packages:1.0.4" \
-    --option packages='build-essential,autoconf,m4,libncurses5-dev,libwxgtk3.0-gtk3-dev,libwxgtk-webview3.0-gtk3-dev,libgl1-mesa-dev,libglu1-mesa-dev,libpng-dev,libssh-dev,unixodbc-dev,xsltproc,fop,libxml2-utils,libncurses-dev,openjdk-11-jdk,procps'
+    "ghcr.io/devcontainers-contrib/features/apt-get-packages:1.0.6" \
+    --option packages='build-essential,autoconf,m4,libncurses5-dev,libwxgtk3.*-dev,libwxgtk-webview3.*-dev,libgl1-mesa-dev,libglu1-mesa-dev,libpng-dev,libssh-dev,unixodbc-dev,xsltproc,fop,libxml2-utils,libncurses-dev,openjdk-1*-jdk,procps'
     
 
 
diff --git a/src/elixir-asdf/library_scripts.sh b/src/elixir-asdf/library_scripts.sh
index 8f9bd9a0e..0d7f34d4b 100644
--- a/src/elixir-asdf/library_scripts.sh
+++ b/src/elixir-asdf/library_scripts.sh
@@ -1,4 +1,3 @@
-#!/bin/bash -i
 
 
 clean_download() {
@@ -10,13 +9,13 @@ clean_download() {
     # The above steps will minimize the leftovers being created while installing the downloader 
     # Supported distros:
     #  debian/ubuntu/alpine
-    
+
     url=$1
     output_location=$2
     tempdir=$(mktemp -d)
     downloader_installed=""
 
-    function _apt_get_install() {
+    _apt_get_install() {
         tempdir=$1
 
         # copy current state of apt list - in order to revert back later (minimize contianer layer size) 
@@ -25,7 +24,7 @@ clean_download() {
         apt-get -y install --no-install-recommends wget ca-certificates
     }
 
-    function _apt_get_cleanup() {
+    _apt_get_cleanup() {
         tempdir=$1
 
         echo "removing wget"
@@ -36,7 +35,7 @@ clean_download() {
         rm -r /var/lib/apt/lists && mv $tempdir/lists /var/lib/apt/lists
     }
 
-    function _apk_install() {
+    _apk_install() {
         tempdir=$1
         # copy current state of apk cache - in order to revert back later (minimize contianer layer size) 
         cp -p -R /var/cache/apk $tempdir 
@@ -44,7 +43,7 @@ clean_download() {
         apk add --no-cache  wget
     }
 
-    function _apk_cleanup() {
+    _apk_cleanup() {
         tempdir=$1
 
         echo "removing wget"
@@ -100,45 +99,39 @@ ensure_nanolayer() {
     local variable_name=$1
 
     local required_version=$2
-    # normalize version
-    if ! [[ $required_version == v* ]]; then
-        required_version=v$required_version
-    fi
 
-    local nanolayer_location=""
+    local __nanolayer_location=""
 
     # If possible - try to use an already installed nanolayer
-    if [[ -z "${NANOLAYER_FORCE_CLI_INSTALLATION}" ]]; then
-        if [[ -z "${NANOLAYER_CLI_LOCATION}" ]]; then
+    if [ -z "${NANOLAYER_FORCE_CLI_INSTALLATION}" ]; then
+        if [ -z "${NANOLAYER_CLI_LOCATION}" ]; then
             if type nanolayer >/dev/null 2>&1; then
                 echo "Found a pre-existing nanolayer in PATH"
-                nanolayer_location=nanolayer
+                __nanolayer_location=nanolayer
             fi
         elif [ -f "${NANOLAYER_CLI_LOCATION}" ] && [ -x "${NANOLAYER_CLI_LOCATION}" ] ; then
-            nanolayer_location=${NANOLAYER_CLI_LOCATION}
-            echo "Found a pre-existing nanolayer which were given in env variable: $nanolayer_location"
+            __nanolayer_location=${NANOLAYER_CLI_LOCATION}
+            echo "Found a pre-existing nanolayer which were given in env variable: $__nanolayer_location"
         fi
 
         # make sure its of the required version
-        if ! [[ -z "${nanolayer_location}" ]]; then
+        if ! [ -z "${__nanolayer_location}" ]; then
             local current_version
-            current_version=$($nanolayer_location --version)
-            if ! [[ $current_version == v* ]]; then
-                current_version=v$current_version
-            fi
+            current_version=$($__nanolayer_location --version)
+
 
             if ! [ $current_version == $required_version ]; then
                 echo "skipping usage of pre-existing nanolayer. (required version $required_version does not match existing version $current_version)"
-                nanolayer_location=""
+                __nanolayer_location=""
             fi
         fi
 
     fi
 
     # If not previuse installation found, download it temporarly and delete at the end of the script 
-    if [[ -z "${nanolayer_location}" ]]; then
+    if [ -z "${__nanolayer_location}" ]; then
 
-        if [ "$(uname -sm)" == "Linux x86_64" ] || [ "$(uname -sm)" == "Linux aarch64" ]; then
+        if [ "$(uname -sm)" = 'Linux x86_64' ] || [ "$(uname -sm)" = "Linux aarch64" ]; then
             tmp_dir=$(mktemp -d -t nanolayer-XXXXXXXXXX)
 
             clean_up () {
@@ -162,7 +155,7 @@ ensure_nanolayer() {
             
             tar xfzv $tmp_dir/$tar_filename -C "$tmp_dir"
             chmod a+x $tmp_dir/nanolayer
-            nanolayer_location=$tmp_dir/nanolayer
+            __nanolayer_location=$tmp_dir/nanolayer
       
 
         else
@@ -172,7 +165,7 @@ ensure_nanolayer() {
     fi
 
     # Expose outside the resolved location
-    declare -g ${variable_name}=$nanolayer_location
+    export ${variable_name}=$__nanolayer_location
 
 }
 
diff --git a/src/erlang-asdf/devcontainer-feature.json b/src/erlang-asdf/devcontainer-feature.json
index 6aa9f8d15..a5ca243c9 100644
--- a/src/erlang-asdf/devcontainer-feature.json
+++ b/src/erlang-asdf/devcontainer-feature.json
@@ -1,6 +1,6 @@
 {
     "id": "erlang-asdf",
-    "version": "2.0.17",
+    "version": "2.0.18",
     "name": "Erlang (via asdf)",
     "documentationURL": "http://github.com/devcontainers-contrib/features/tree/main/src/erlang-asdf",
     "description": "Erlang is a general-purpose, concurrent, functional programming language, and a garbage-collected runtime system.",
diff --git a/src/erlang-asdf/install.sh b/src/erlang-asdf/install.sh
index 73f1072e8..afc941415 100755
--- a/src/erlang-asdf/install.sh
+++ b/src/erlang-asdf/install.sh
@@ -1,22 +1,21 @@
-#!/bin/bash -i
 
 set -e
 
-source ./library_scripts.sh
+. ./library_scripts.sh
 
 # nanolayer is a cli utility which keeps container layers as small as possible
 # source code: https://github.com/devcontainers-contrib/nanolayer
 # `ensure_nanolayer` is a bash function that will find any existing nanolayer installations, 
 # and if missing - will download a temporary copy that automatically get deleted at the end 
 # of the script
-ensure_nanolayer nanolayer_location "v0.4.45"
+ensure_nanolayer nanolayer_location "v0.5.5"
 
 
 $nanolayer_location \
     install \
     devcontainer-feature \
-    "ghcr.io/devcontainers-contrib/features/apt-get-packages:1.0.4" \
-    --option packages='build-essential,autoconf,m4,libncurses5-dev,libwxgtk3.0-gtk3-dev,libwxgtk-webview3.0-gtk3-dev,libgl1-mesa-dev,libglu1-mesa-dev,libpng-dev,libssh-dev,unixodbc-dev,xsltproc,fop,libxml2-utils,libncurses-dev,openjdk-11-jdk,procps'
+    "ghcr.io/devcontainers-contrib/features/apt-get-packages:1.0.6" \
+    --option packages='build-essential,autoconf,m4,libncurses5-dev,libwxgtk3.*-dev,libwxgtk-webview3.*-dev,libgl1-mesa-dev,libglu1-mesa-dev,libpng-dev,libssh-dev,unixodbc-dev,xsltproc,fop,libxml2-utils,libncurses-dev,openjdk-1*-jdk,procps'
     
 
 
diff --git a/src/erlang-asdf/library_scripts.sh b/src/erlang-asdf/library_scripts.sh
index 8f9bd9a0e..0d7f34d4b 100644
--- a/src/erlang-asdf/library_scripts.sh
+++ b/src/erlang-asdf/library_scripts.sh
@@ -1,4 +1,3 @@
-#!/bin/bash -i
 
 
 clean_download() {
@@ -10,13 +9,13 @@ clean_download() {
     # The above steps will minimize the leftovers being created while installing the downloader 
     # Supported distros:
     #  debian/ubuntu/alpine
-    
+
     url=$1
     output_location=$2
     tempdir=$(mktemp -d)
     downloader_installed=""
 
-    function _apt_get_install() {
+    _apt_get_install() {
         tempdir=$1
 
         # copy current state of apt list - in order to revert back later (minimize contianer layer size) 
@@ -25,7 +24,7 @@ clean_download() {
         apt-get -y install --no-install-recommends wget ca-certificates
     }
 
-    function _apt_get_cleanup() {
+    _apt_get_cleanup() {
         tempdir=$1
 
         echo "removing wget"
@@ -36,7 +35,7 @@ clean_download() {
         rm -r /var/lib/apt/lists && mv $tempdir/lists /var/lib/apt/lists
     }
 
-    function _apk_install() {
+    _apk_install() {
         tempdir=$1
         # copy current state of apk cache - in order to revert back later (minimize contianer layer size) 
         cp -p -R /var/cache/apk $tempdir 
@@ -44,7 +43,7 @@ clean_download() {
         apk add --no-cache  wget
     }
 
-    function _apk_cleanup() {
+    _apk_cleanup() {
         tempdir=$1
 
         echo "removing wget"
@@ -100,45 +99,39 @@ ensure_nanolayer() {
     local variable_name=$1
 
     local required_version=$2
-    # normalize version
-    if ! [[ $required_version == v* ]]; then
-        required_version=v$required_version
-    fi
 
-    local nanolayer_location=""
+    local __nanolayer_location=""
 
     # If possible - try to use an already installed nanolayer
-    if [[ -z "${NANOLAYER_FORCE_CLI_INSTALLATION}" ]]; then
-        if [[ -z "${NANOLAYER_CLI_LOCATION}" ]]; then
+    if [ -z "${NANOLAYER_FORCE_CLI_INSTALLATION}" ]; then
+        if [ -z "${NANOLAYER_CLI_LOCATION}" ]; then
             if type nanolayer >/dev/null 2>&1; then
                 echo "Found a pre-existing nanolayer in PATH"
-                nanolayer_location=nanolayer
+                __nanolayer_location=nanolayer
             fi
         elif [ -f "${NANOLAYER_CLI_LOCATION}" ] && [ -x "${NANOLAYER_CLI_LOCATION}" ] ; then
-            nanolayer_location=${NANOLAYER_CLI_LOCATION}
-            echo "Found a pre-existing nanolayer which were given in env variable: $nanolayer_location"
+            __nanolayer_location=${NANOLAYER_CLI_LOCATION}
+            echo "Found a pre-existing nanolayer which were given in env variable: $__nanolayer_location"
         fi
 
         # make sure its of the required version
-        if ! [[ -z "${nanolayer_location}" ]]; then
+        if ! [ -z "${__nanolayer_location}" ]; then
             local current_version
-            current_version=$($nanolayer_location --version)
-            if ! [[ $current_version == v* ]]; then
-                current_version=v$current_version
-            fi
+            current_version=$($__nanolayer_location --version)
+
 
             if ! [ $current_version == $required_version ]; then
                 echo "skipping usage of pre-existing nanolayer. (required version $required_version does not match existing version $current_version)"
-                nanolayer_location=""
+                __nanolayer_location=""
             fi
         fi
 
     fi
 
     # If not previuse installation found, download it temporarly and delete at the end of the script 
-    if [[ -z "${nanolayer_location}" ]]; then
+    if [ -z "${__nanolayer_location}" ]; then
 
-        if [ "$(uname -sm)" == "Linux x86_64" ] || [ "$(uname -sm)" == "Linux aarch64" ]; then
+        if [ "$(uname -sm)" = 'Linux x86_64' ] || [ "$(uname -sm)" = "Linux aarch64" ]; then
             tmp_dir=$(mktemp -d -t nanolayer-XXXXXXXXXX)
 
             clean_up () {
@@ -162,7 +155,7 @@ ensure_nanolayer() {
             
             tar xfzv $tmp_dir/$tar_filename -C "$tmp_dir"
             chmod a+x $tmp_dir/nanolayer
-            nanolayer_location=$tmp_dir/nanolayer
+            __nanolayer_location=$tmp_dir/nanolayer
       
 
         else
@@ -172,7 +165,7 @@ ensure_nanolayer() {
     fi
 
     # Expose outside the resolved location
-    declare -g ${variable_name}=$nanolayer_location
+    export ${variable_name}=$__nanolayer_location
 
 }
 
diff --git a/test/elixir-asdf/scenarios.json b/test/elixir-asdf/scenarios.json
index 94d72df43..a002ed79d 100644
--- a/test/elixir-asdf/scenarios.json
+++ b/test/elixir-asdf/scenarios.json
@@ -1,6 +1,24 @@
 {
-    "test": {
-        "image": "mcr.microsoft.com/devcontainers/base:debian",
+    "test_debian_11": {
+        "image": "mcr.microsoft.com/devcontainers/base:debian-11",
+        "features": {
+            "elixir-asdf": {}
+        }
+    },
+    "test_debian_12": {
+        "image": "mcr.microsoft.com/devcontainers/base:debian-12",
+        "features": {
+            "elixir-asdf": {}
+        }
+    },
+    "test_ubuntu_2004": {
+        "image": "mcr.microsoft.com/devcontainers/base:ubuntu-20.04",
+        "features": {
+            "elixir-asdf": {}
+        }
+    },
+    "test_ubuntu_2204": {
+        "image": "mcr.microsoft.com/devcontainers/base:ubuntu-22.04",
         "features": {
             "elixir-asdf": {}
         }
diff --git a/test/elixir-asdf/test.sh b/test/elixir-asdf/test_debian_11.sh
similarity index 100%
rename from test/elixir-asdf/test.sh
rename to test/elixir-asdf/test_debian_11.sh
diff --git a/test/elixir-asdf/test_debian_12.sh b/test/elixir-asdf/test_debian_12.sh
new file mode 100755
index 000000000..7187b5e5a
--- /dev/null
+++ b/test/elixir-asdf/test_debian_12.sh
@@ -0,0 +1,9 @@
+#!/bin/bash -i
+
+set -e
+
+source dev-container-features-test-lib
+
+check "elixir --version" elixir --version
+
+reportResults
diff --git a/test/elixir-asdf/test_ubuntu_2004.sh b/test/elixir-asdf/test_ubuntu_2004.sh
new file mode 100755
index 000000000..7187b5e5a
--- /dev/null
+++ b/test/elixir-asdf/test_ubuntu_2004.sh
@@ -0,0 +1,9 @@
+#!/bin/bash -i
+
+set -e
+
+source dev-container-features-test-lib
+
+check "elixir --version" elixir --version
+
+reportResults
diff --git a/test/elixir-asdf/test_ubuntu_2204.sh b/test/elixir-asdf/test_ubuntu_2204.sh
new file mode 100755
index 000000000..7187b5e5a
--- /dev/null
+++ b/test/elixir-asdf/test_ubuntu_2204.sh
@@ -0,0 +1,9 @@
+#!/bin/bash -i
+
+set -e
+
+source dev-container-features-test-lib
+
+check "elixir --version" elixir --version
+
+reportResults
diff --git a/test/erlang-asdf/scenarios.json b/test/erlang-asdf/scenarios.json
index 5bb4cd126..5ba2815d5 100644
--- a/test/erlang-asdf/scenarios.json
+++ b/test/erlang-asdf/scenarios.json
@@ -1,8 +1,14 @@
 {
-    "test": {
+    "test_debian_bullseye": {
         "image": "debian:bullseye",
         "features": {
             "erlang-asdf": {}
         }
+    },
+    "test_ubuntu": {
+        "image": "ubuntu",
+        "features": {
+            "erlang-asdf": {}
+        }
     }
 }
\ No newline at end of file
diff --git a/test/erlang-asdf/test_debian_bullseye.sh b/test/erlang-asdf/test_debian_bullseye.sh
new file mode 100755
index 000000000..8563f1607
--- /dev/null
+++ b/test/erlang-asdf/test_debian_bullseye.sh
@@ -0,0 +1,9 @@
+#!/bin/bash -i
+
+set -e
+
+source dev-container-features-test-lib
+
+check "erl -eval '{ok, Version} = file:read_file(filename:join([code:root_dir(), "releases", erlang:system_info(otp_release), "OTP_VERSION"])), io:fwrite(Version), halt().' -noshell" erl -eval '{ok, Version} = file:read_file(filename:join([code:root_dir(), "releases", erlang:system_info(otp_release), "OTP_VERSION"])), io:fwrite(Version), halt().' -noshell
+
+reportResults
diff --git a/test/erlang-asdf/test_ubuntu.sh b/test/erlang-asdf/test_ubuntu.sh
new file mode 100755
index 000000000..8563f1607
--- /dev/null
+++ b/test/erlang-asdf/test_ubuntu.sh
@@ -0,0 +1,9 @@
+#!/bin/bash -i
+
+set -e
+
+source dev-container-features-test-lib
+
+check "erl -eval '{ok, Version} = file:read_file(filename:join([code:root_dir(), "releases", erlang:system_info(otp_release), "OTP_VERSION"])), io:fwrite(Version), halt().' -noshell" erl -eval '{ok, Version} = file:read_file(filename:join([code:root_dir(), "releases", erlang:system_info(otp_release), "OTP_VERSION"])), io:fwrite(Version), halt().' -noshell
+
+reportResults