diff --git a/filesystem/cdpath.nu b/filesystem/cdpath.nu
index fc9d0b9..3f47db5 100644
--- a/filesystem/cdpath.nu
+++ b/filesystem/cdpath.nu
@@ -20,9 +20,9 @@ def-env c [dir = ""] {
     }
     
     let complete_dir = if $complete_dir == "" { 
-        error make {msg: "No such path"} 
+        error make -u {msg: "No such path"} 
     } else if (($complete_dir | path expand | path type) != "dir") {
-        error make {msg: "Not a directory"}
+        error make -u {msg: "Not a directory"}
     } else { 
         ($complete_dir | path expand)
     }
diff --git a/helpers/update_hosts.nu b/helpers/update_hosts.nu
index 6cf9f44..e0dd01a 100644
--- a/helpers/update_hosts.nu
+++ b/helpers/update_hosts.nu
@@ -45,18 +45,19 @@ module hosts {
 
                     let TMP_FILE = ($TMP_FILE | append $BLACKLIST)
 
-                    $TMP_FILE | save $OLD_FILE
+                    $TMP_FILE | save /tmp/temphostsfile
                     if ($env.LAST_EXIT_CODE == 0) {
+			sudo mv /tmp/temphostsfile $OLD_FILE
                         echo "Done!"
                     } else {
-                        error make {msg: "Something went wrong while overwriting the /etc/hosts file"}
+                        error make -u {msg: "Something went wrong while overwriting the /etc/hosts file"}
                     }       
                 }       
             } else {
                 echo "No updates available."
             }
         } else {
-            error make {msg: "Failed downloading the hosts file, try again."}
+            error make -u {msg: "Failed downloading the hosts file, try again."}
         }    
     }
 }
diff --git a/maths/math_functions.nu b/maths/math_functions.nu
index 77f4b4c..d777e7a 100644
--- a/maths/math_functions.nu
+++ b/maths/math_functions.nu
@@ -30,7 +30,7 @@ def fact [num: int] {
 			seq 2 $num | math product
 		}
 	} else {
-		error make {msg: "can only calculate non-negative integers"}
+		error make -u {msg: "can only calculate non-negative integers"}
 	}
 }