diff --git a/debian_install_nvidia.sh b/debian_install_nvidia.sh
index 637ec40..7804c30 100755
--- a/debian_install_nvidia.sh
+++ b/debian_install_nvidia.sh
@@ -214,11 +214,14 @@ COMMANDS=(
 
 function checkCommands() {
 
+  local COMMANDS_NOTFOUND
+  local a
+
   if [[ $(which --help 2>/dev/null) ]] && [[ $(echo --help 2>/dev/null) ]]; then
-    local a=0
+    a=0
     for command in ${@}; do
       if [[ ! $(which $command 2>/dev/null) ]]; then
-        local COMMANDS_NOTFOUND[$a]=${command}
+        COMMANDS_NOTFOUND[$a]=${command}
         let a++
       fi
     done
@@ -240,7 +243,9 @@ checkCommands "${COMMANDS[*]}"
 
 function questionresponse() {
 
-  local response=${1}
+  local response
+
+  response=${1}
 
   read -r -p "" response
   if [[ $(echo $response | sed 's/ //g') =~ ^([yY][eE][sS]|[yY])$ ]]; then
@@ -318,8 +323,11 @@ function pkg_installcheck() {
 # Check and install package related dependencies if they are missing
 function pkgdependencies() {
 
+  local a
+  local b
+
   # Generate a list of missing dependencies
-  local a=0
+  a=0
   for p in ${@}; do
     if [[ $(pkg_installcheck ${p}) -ne 0 ]]; then
       validlist[$a]=${p}
@@ -340,7 +348,7 @@ function pkgdependencies() {
   fi
 
   # Install missing dependencies, be informative
-  local b=0
+  b=0
   for pkgdep in ${validlist[@]}; do
     echo -e "$(( $b + 1 ))/$(( ${#validlist[*]} )) - Installing ${_pkgname} dependency ${pkgdep}"
     sudo apt install -y ${pkgdep} &> /dev/null
@@ -383,6 +391,11 @@ function download_files() {
 
 function prepare_deb_sources() {
 
+  local oldlib_sed
+  local lib_sed
+  local oldlib_files
+  local i
+
   # Extract debian control files
   cd ${WORKDIR}/${pkgdir}/
   tar xf ${filebases[0]}
@@ -394,17 +407,17 @@ function prepare_deb_sources() {
       for oldlib in ${!library_fixes[@]}; do
 
         # sed-friendly name
-        local oldlib_sed=$(printf '%s' ${oldlib} | sed 's/\./\\\./g')
+        oldlib_sed=$(printf '%s' ${oldlib} | sed 's/\./\\\./g')
 
         for lib in ${library_fixes[$oldlib]}; do
 
           # sed-friendly name
-          local lib_sed=$(printf '%s' ${lib} | sed 's/\./\\\./g')
+          lib_sed=$(printf '%s' ${lib} | sed 's/\./\\\./g')
 
           # Files which have old library files mentioned
-          local i=0
+          i=0
           for oldlib_file in $(grep -rl "${oldlib}" debian/ | tr '\n' ' '); do
-            local oldlib_files[$i]=${oldlib_file}
+            oldlib_files[$i]=${oldlib_file}
             let i++
           done
 
@@ -418,6 +431,9 @@ function prepare_deb_sources() {
 
     function rename_deb_files() {
 
+      local n_new
+      local IFS
+    
       # Remove this suffix
       sed -i 's/\-no\-compat32//' debian/rules.defs
 
@@ -431,7 +447,7 @@ function prepare_deb_sources() {
       sed -i "s/384/${pkgver_major}/g" debian/templates/control.in
       ############
 
-      local IFS=$'\n'
+      IFS=$'\n'
       for n in $(ls debian/ -w 1); do
 
         # IMPORTANT! KEEP THIS IF STATEMENT ORDER BELOW!!
@@ -445,7 +461,7 @@ function prepare_deb_sources() {
         fi
 
         if [[ $(printf '%s' ${n} | grep ${oldver_major}) ]]; then
-          local n_new=$(printf '%s' ${n} | sed "s/${oldver_major}/${pkgver_major}/")
+          n_new=$(printf '%s' ${n} | sed "s/${oldver_major}/${pkgver_major}/")
           mv debian/${n} debian/${n_new}
 
           if [[ $? -ne 0 ]]; then
@@ -512,6 +528,9 @@ function compile_nvidia() {
 
 function install_nvidia() {
 
+  local oldpkg
+  local oldpkg_check
+
   for syspkg in ${nvidia_required_packages[@]}; do
     if [[ $(echo $(dpkg -s ${syspkg} &>/dev/null)$?) -ne 0 ]]; then
       echo -e "Installing missing dependency ${syspkg}\n"
@@ -526,8 +545,8 @@ function install_nvidia() {
   cd ${WORKDIR}/compiled_deb
   for pkg in ${nvidia_install_packages[@]}; do
 
-    local oldpkg=$(printf '%s' ${pkg} | sed 's/\-[0-9]*$//')
-    local oldpkg_check=$(dpkg --get-selections | grep ${oldpkg} | awk '{print $1}')
+    oldpkg=$(printf '%s' ${pkg} | sed 's/\-[0-9]*$//')
+    oldpkg_check=$(dpkg --get-selections | grep ${oldpkg} | awk '{print $1}')
 
     if [[ $(echo ${oldpkg_check} | wc -w) -eq 1 ]]; then
       if [[ ! ${oldpkg_check} =~ ^*${pkgver_major}$ ]]; then
@@ -553,9 +572,11 @@ function install_nvidia() {
 
 function install_vulkan() {
 
+  local syspkg
+
   # Vulkan loader
   if [[ $? -eq 0 ]]; then
-    local syspkg=libvulkan1
+    syspkg=libvulkan1
     if [[ $(echo $(dpkg -s ${syspkg} &>/dev/null)$?) -ne 0 ]]; then
       sudo apt update && sudo apt install -y ${syspkg}
     fi
diff --git a/updatewine.sh b/updatewine.sh
index 1a539e6..8202a61 100755
--- a/updatewine.sh
+++ b/updatewine.sh
@@ -72,12 +72,15 @@ SUDO_GROUPS=(
 
 function checkCommands() {
 
+  local COMMANDS_NOTFOUND
+  local a
+
   if [[ $(which --help 2>/dev/null) ]] && [[ $(echo --help 2>/dev/null) ]]; then
 
-    local a=0
+    a=0
     for command in ${@}; do
       if [[ ! $(which $command 2>/dev/null) ]]; then
-        local COMMANDS_NOTFOUND[$a]=${command}
+        COMMANDS_NOTFOUND[$a]=${command}
         let a++
       fi
     done
@@ -244,17 +247,24 @@ function questionresponse() {
 
 function reqsCheck() {
 
-  local AVAIL_SPACE=$(df -h -B MB --output=avail . | sed '1d; s/[A-Z]*//g')
-  local REC_SPACE=8000
-  local MSG_SPACE="\e[1mWARNING:\e[0m Not sufficient storage space\n\nYou will possibly run out of space while compiling software.\n\
+  local AVAIL_SPACE
+  local REC_SPACE
+  local MSG_SPACE
+  local AVAIL_RAM
+  local REC_RAM
+  local MSG_RAM
+
+  AVAIL_SPACE=$(df -h -B MB --output=avail . | sed '1d; s/[A-Z]*//g')
+  REC_SPACE=8000
+  MSG_SPACE="\e[1mWARNING:\e[0m Not sufficient storage space\n\nYou will possibly run out of space while compiling software.\n\
 The script strongly recommends ~\e[1m$((${REC_SPACE} / 1000)) GB\e[0m at least to compile software successfully but you have only\n\
 \e[1m${AVAIL_SPACE} MB\e[0m left on the filesystem the script is currently placed at.\n\n\
 Be aware that the script process may fail because of this, especially while compiling Wine Staging.\n\n\
 Do you really want to continue? [Y/n]"
 
-  local AVAIL_RAM=$(( $(grep -oP "(?<=^MemFree:).*[0-9]" /proc/meminfo | sed 's/ //g') / 1024 ))
-  local REC_RAM=4096
-  local MSG_RAM="\e[1mWARNING:\e[0m Not sufficient RAM available\n\nCompilation processes will likely fail.\n\
+  AVAIL_RAM=$(( $(grep -oP "(?<=^MemFree:).*[0-9]" /proc/meminfo | sed 's/ //g') / 1024 ))
+  REC_RAM=4096
+  MSG_RAM="\e[1mWARNING:\e[0m Not sufficient RAM available\n\nCompilation processes will likely fail.\n\
 The script strongly recommends ~\e[1m${REC_RAM} MB\e[0m at least to compile software successfully but you have only\n\
 \e[1m${AVAIL_RAM} MB\e[0m left on the computer the script is currently placed at.\n\n\
 Be aware that the script process may fail because of this, especially while compiling DXVK.\n\n\
@@ -262,19 +272,27 @@ Do you really want to continue? [Y/n]"
 
   function reqs_property() {
 
-    local avail_prop="${1}"
-    local req_prop="${2}"
-    local req_message="${3}"
-    local req_installtargets="${4}"
+    local avail_prop
+    local req_prop
+    local req_message
+    local req_installtargets
+    local req_targetconditions
+    local fullcondition
+    local i
+
+    avail_prop="${1}"
+    req_prop="${2}"
+    req_message="${3}"
+    req_installtargets="${4}"
 
-    local i=0
+    i=0
     for req_installtarget in ${req_installtargets}; do
       req_targetconditions[$i]=$(echo "[[ ! -v ${req_installtarget} ]] ||")
       let i++
     done
 
-    local req_targetconditions=($(echo ${req_targetconditions[@]} | sed 's/\(.*\) ||/\1 /'))
-    local fullcondition="[[ "${avail_prop}" -lt "${req_prop}" ]] && ($(echo ${req_targetconditions[@]}))"
+    req_targetconditions=($(echo ${req_targetconditions[@]} | sed 's/\(.*\) ||/\1 /'))
+    fullcondition="[[ "${avail_prop}" -lt "${req_prop}" ]] && ($(echo ${req_targetconditions[@]}))"
 
     if $(eval ${fullcondition}); then
       INFO_SEP