diff --git a/home.nix b/home.nix
index 1557f4a..a16278c 100755
--- a/home.nix
+++ b/home.nix
@@ -110,16 +110,16 @@
           if test "$fish_prompt_pwd_dir_length" -eq 0
               echo $tmp
           else
-              # Shorten to at most $fish_prompt_pwd_dir_length characters per directory
+              # Shorten to at most 100 characters per directory
               # with full-length-dirs components left at full length.
               set -l full
               if test $fish_prompt_pwd_full_dirs -gt 0
-                  set -l all (string split -m (math $fish_prompt_pwd_full_dirs - 1) -r / $tmp)
+                  set -l all (string split -m (math 100 - 1) -r / $tmp)
                   set tmp $all[1]
                   set full $all[2..]
               else if test $fish_prompt_pwd_full_dirs -eq 0
                   # 0 means not even the last component is kept
-                  string replace -ar '(\.?[^/]{'"$fish_prompt_pwd_dir_length"'})[^/]*' '$1' $tmp
+                  string replace -ar '(\.?[^/]{'"100"'})[^/]*' '$1' $tmp
                   continue
               end