diff --git a/server_scripts/database_update.sh b/server_scripts/database_update.sh
index e04b529..da0f85a 100755
--- a/server_scripts/database_update.sh
+++ b/server_scripts/database_update.sh
@@ -28,7 +28,7 @@ fi
 for I in $list
 do
   TIME=$(stat -c "%Y" "$I.tar.$extension")
-  DEPS=$($pcompress -dc "$I.tar.$extension" | tar -xOf - DEPS 2>/dev/null | tr -s '\n\t ' ' ')
+  DEPS=$(cat "$I.tar.$extension" | $pcompress -dc 2>/dev/null | tar -xOf - DEPS 2>/dev/null | tr -s '\n\t ' ' ')
   if grep -q -w "^$I" pkglist 2>/dev/null
   then
     sed -i "s|^$I .*\$|$I $TIME $DEPS|g" pkglist
diff --git a/server_scripts/gen_install.sh b/server_scripts/gen_install.sh
index d8645d7..abc42a8 100755
--- a/server_scripts/gen_install.sh
+++ b/server_scripts/gen_install.sh
@@ -86,7 +86,7 @@ mkdir -p "$tmpdir" || exit $?
     echo "Cannot reach $HTTP_ADDRESS" > /dev/stderr
     exit 1
   fi
-  $pcompress -dc "zpkg.tar.$extension" | tar -xf - || exit $?
+  cat "$zpkg.tar.$extension" | $pcompress -dc 2>/dev/null | tar -xf - || exit $?
 
 # install zpkg package
   ROOT/usr/local/bin/zpkg -f install zpkg || exit $?
diff --git a/src/deploy.sh b/src/deploy.sh
index eca8c3e..390402a 100644
--- a/src/deploy.sh
+++ b/src/deploy.sh
@@ -43,7 +43,7 @@ deploy_folder()
 {
   if [ -f "$1" ] && echo "$1" | grep -q '\.tar\.'"$extension\$" # file and valid extension
   then
-    $pcompress -dc >/dev/null 2>&1 | tar -tf - >/dev/null 2>&1|| { echo "File '$1' is not a valid archive" && return 1; }
+    cat "$1" | $pcompress -dc 2>/dev/null | tar -tf - >/dev/null 2>&1|| { echo "File '$1' is not a valid archive" && return 1; }
     deploy_package "$1" "$1" || return $?
   elif [ -d "$1" ] # folder
   then
diff --git a/src/install.sh b/src/install.sh
index 49b20e6..d6d58cc 100644
--- a/src/install.sh
+++ b/src/install.sh
@@ -3,7 +3,7 @@
 unpack()
 {
   echo "Unpacking $1"
-  $pcompress -dc "$1" | tar -xf -
+  cat "$1" | $pcompress -dc 2>/dev/null | tar -xf -
 }
 
 # $1 = package , $2 = prefix
diff --git a/src/remove.sh b/src/remove.sh
index 3dc728d..0c53b11 100644
--- a/src/remove.sh
+++ b/src/remove.sh
@@ -20,7 +20,7 @@ remove_package()
   fi
   echo "Removing $1"
 
-  list=$($pcompress -dc "$archive" | tar -tf - 2>/dev/null)
+  list=$(cat "$archive" | $pcompress -dc 2>/dev/null | tar -tf - 2>/dev/null)
   echo "$list" | grep "^ROOT/" | sed 's|^ROOT/||g' | tac | delete_files / $2
   echo "$list" | grep "^HOME/" | sed 's|^HOME/||g' | tac | delete_files "$HOME"
 
diff --git a/src/upgrade.sh b/src/upgrade.sh
index 6f92223..4637354 100644
--- a/src/upgrade.sh
+++ b/src/upgrade.sh
@@ -23,7 +23,7 @@ upgrade_package()
     fetch_package "$1" || { echo "Package '$1' not found" >&2 && return 1; }
     unpack "$1.tar.$extension" || return $?
 
-    oldlist=$($pcompress -dc "$PKG_PATH/$1.tar.$extension" | tar -tf - 2>/dev/null | sort)
+    oldlist=$(cat "$PKG_PATH/$1.tar.$extension" | $pcompress -dc 2>/dev/null | tar -tf - 2>/dev/null | sort)
     echo "$oldlist" | grep "^ROOT/" | to_delete - ROOT | sed 's|^ROOT/||g' | tac | delete_files / $2
     echo "$oldlist" | grep "^HOME/" | to_delete - HOME | sed 's|^HOME/||g' | tac | delete_files "$HOME"
 
diff --git a/src/view.sh b/src/view.sh
index ce42ecc..19043c4 100644
--- a/src/view.sh
+++ b/src/view.sh
@@ -9,7 +9,7 @@ deps()
 
 # $1 = pkg file
 desc() {
-  $pcompress -dc "$1" | tar -xOf - DESC
+  cat "$1" | $pcompress -dc 2>/dev/null | tar -xOf - DESC
 }
 
 resolve_packages()
@@ -52,7 +52,7 @@ is_installed()
 
 # $1 = file
 view_package_file() {
-  tree=$($pcompress -dc "$1" 2>/dev/null | tar -tf - 2>/dev/null) || exit $?
+  tree=$(cat "$1" | $pcompress -dc 2>/dev/null | tar -tf - 2>/dev/null) || exit $?
   echo "$tree" | grep -E '^ROOT/|^HOME/' | sed "/\/$/d ; s|^ROOT/|/|g ; s|^HOME/|$HOME/|g" 2>/dev/null
 }