diff --git a/dot-local/bin/aliases b/dot-local/bin/aliases
index 9346eee..7ed48b2 100755
--- a/dot-local/bin/aliases
+++ b/dot-local/bin/aliases
@@ -20,6 +20,7 @@ a imgsum 'printf "$argv: " && identify -format "%#\n"'
 a l ls
 a la 'l -a'
 a less 'eval $PAGER'
+a nix 'bax . ~/.nix-profile/etc/profile.d/nix.sh; command nix'
 a off shutdown
 a offh 'off (math "60*"$argv);:'
 a open xdg-open
diff --git a/dot-local/bin/appsquash b/dot-local/bin/appsquash
deleted file mode 100755
index 741e6a8..0000000
--- a/dot-local/bin/appsquash
+++ /dev/null
@@ -1,18 +0,0 @@
-#!/bin/sh
-mksquashfs $@ squash -comp zstd -b 1M -Xcompression-level 22
-
-cat > script <<'EOF'
-#!/bin/sh
-file=$(basename $0)
-DIR=/tmp/.mount_$file$RANDOM
-mkdir $DIR
-squashfuse -o offset=154 $0 $DIR
-$DIR/AppRun $@
-fusermount -uz $DIR
-rmdir $DIR
-exit
-EOF
-
-cat script squash > $(basename $@).sh
-chmod +x $(basename $@).sh
-rm script squash
diff --git a/dot-local/bin/zzexe b/dot-local/bin/zzexe
index 7512b24..a2d48de 100755
--- a/dot-local/bin/zzexe
+++ b/dot-local/bin/zzexe
@@ -132,7 +132,7 @@ else
   (exit 127); res=127
 fi; exit $res
 EOF
-    zstd -cv19 "$file") > "$tmp" || {
+    zstd -cv22 --ultra "$file") > "$tmp" || {
       res=$?
       printf >&2 '%s\n' "$0: compression not possible for $i, file unchanged."
       continue