diff --git a/hm/scripts/.bsh/bashrc_unsortable b/hm/scripts/.bsh/bashrc_unsortable
index 8ae2abe..d00f8a7 100644
--- a/hm/scripts/.bsh/bashrc_unsortable
+++ b/hm/scripts/.bsh/bashrc_unsortable
@@ -23,3 +23,13 @@ else
     col=33;
 fi
 export PS1="\[\e]2;\u@\H \w\a\]\[\e[0;37m\][\[\e[0;${col}m\]\u\[\e[0;37m\]@\[\e[0;34m\]\h \[\e[0;36m\]\W\[\e[0;37m\]]\$\[\e[0m\] "
+
+# Replace the content of a symlinked file
+# Useful for ad-hoc replacing of Nix config files
+subl() {
+    [ -f "$1" ] || return 3
+    [ -h "$1" ] || return 4
+    src="$(readlink -f "$1")"
+    rm "$1"
+    cat "$src" > "$1"
+}
diff --git a/hm/shell/zshrc.sh b/hm/shell/zshrc.sh
index 5130f51..d000078 100644
--- a/hm/shell/zshrc.sh
+++ b/hm/shell/zshrc.sh
@@ -110,3 +110,12 @@ setopt HIST_REDUCE_BLANKS        # Remove superfluous blanks before recording en
 unsetopt HIST_VERIFY               # Don't execute immediately upon history expansion.
 unsetopt HIST_BEEP                 # Beep when accessing nonexistent history.
 
+# Replace the content of a symlinked file
+# Useful for ad-hoc replacing of Nix config files
+subl() {
+    [ -f "$1" ] || return 3
+    [ -h "$1" ] || return 4
+    src="$(readlink -f "$1")"
+    rm "$1"
+    < "$src" > "$1"
+}