diff --git a/share/functions/__fish_apropos.fish b/share/functions/__fish_apropos.fish
index 8bf412e98..6c4d70be5 100644
--- a/share/functions/__fish_apropos.fish
+++ b/share/functions/__fish_apropos.fish
@@ -40,8 +40,7 @@ if test $status -eq 0 -a (count $sysver) -eq 3
 
         if test $age -ge $max_age
             test -d "$dir" || mkdir -m 700 -p $dir
-            /usr/libexec/makewhatis -o "$whatis" (/usr/bin/manpath | string split : | xargs realpath) >/dev/null 2>&1 </dev/null &
-            disown $last_pid
+            /bin/sh -c '( "$@" ) >/dev/null 2>&1 </dev/null &' -- /usr/libexec/makewhatis -o "$whatis" (/usr/bin/manpath | string split : | xargs realpath)
         end
     end
 else
diff --git a/share/functions/__fish_config_interactive.fish b/share/functions/__fish_config_interactive.fish
index ab00671de..1b5e4b99e 100644
--- a/share/functions/__fish_config_interactive.fish
+++ b/share/functions/__fish_config_interactive.fish
@@ -99,9 +99,8 @@ end" >$__fish_config_dir/config.fish
             set -l update_args -B $__fish_data_dir/tools/create_manpage_completions.py --manpath --cleanup-in $__fish_user_data_dir/generated_completions --cleanup-in $__fish_cache_dir/generated_completions
             if set -l python (__fish_anypython)
                 # Run python directly in the background and swallow all output
-                $python $update_args >/dev/null 2>&1 &
-                # Then disown the job so that it continues to run in case of an early exit (#6269)
-                disown >/dev/null 2>&1
+                # Orphan the job so that it continues to run in case of an early exit (#6269)
+                /bin/sh -c '( "$@" ) >/dev/null 2>&1 &' -- $python $update_args
             end
         end
     end
diff --git a/share/functions/fish_git_prompt.fish b/share/functions/fish_git_prompt.fish
index d9b7281ec..7127ee865 100644
--- a/share/functions/fish_git_prompt.fish
+++ b/share/functions/fish_git_prompt.fish
@@ -180,8 +180,7 @@ if string match -q Darwin -- (uname) && string match -q /usr/bin/git -- (command
     else
         # git is installed, but on the first run it may be very slow as xcrun needs to populate the cache.
         # Kick it off in the background to populate the cache.
-        /bin/sh -c '/usr/bin/git --version; touch /tmp/__fish_git_ready' &>/dev/null &
-        disown $last_pid &>/dev/null
+        /bin/sh -c '( /usr/bin/git --version; touch /tmp/__fish_git_ready ) >/dev/null 2>&1 &'
         function __fish_git_prompt_ready
             path is /tmp/__fish_git_ready || return 1
             # git is ready, erase the function.
diff --git a/share/functions/help.fish b/share/functions/help.fish
index 942eecba7..38da986bf 100644
--- a/share/functions/help.fish
+++ b/share/functions/help.fish
@@ -239,8 +239,7 @@ function help --description 'Show help for the fish shell'
         # The space before the /c is to prevent msys2 from expanding it to a path
         $fish_browser " /c" start $page_url
     else if contains -- $fish_browser[1] $graphical_browsers
-        $fish_browser $page_url &
-        disown $last_pid >/dev/null 2>&1
+        /bin/sh -c '( "$@" ) &' -- $fish_browser $page_url
     else
         $fish_browser $page_url
     end