diff --git a/flake.nix b/flake.nix
index 71491a73..22e3b62c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -407,9 +407,9 @@
               echo '${selfRef}' > flake
 
               [ -e old ] && nix store diff-closures ./old ./current
-              ln -sfT `pwd`/current /nix/var/nix/gcroots/microvm/${name}
-              ln -sfT `pwd`/booted /nix/var/nix/gcroots/microvm/booted-${name}
-              ln -sfT `pwd`/old /nix/var/nix/gcroots/microvm/old-${name}
+              ln -sfT \$PWD/current /nix/var/nix/gcroots/microvm/${name}
+              ln -sfT \$PWD/booted /nix/var/nix/gcroots/microvm/booted-${name}
+              ln -sfT \$PWD/old /nix/var/nix/gcroots/microvm/old-${name}
 
               systemctl restart microvm@${name}.service
               END