diff --git a/default.nix b/default.nix
index 71d1a80ad..00ec5b617 100644
--- a/default.nix
+++ b/default.nix
@@ -1,3 +1,3 @@
-(import (fetchTarball https://github.com/edolstra/flake-compat/archive/master.tar.gz) {
+(import (fetchTarball "https://github.com/edolstra/flake-compat/archive/master.tar.gz") {
   src = ./.;
 }).defaultNix
diff --git a/shell.nix b/shell.nix
index 330df0ab6..918f4bbd9 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,3 +1,3 @@
-(import (fetchTarball https://github.com/edolstra/flake-compat/archive/master.tar.gz) {
+(import (fetchTarball "https://github.com/edolstra/flake-compat/archive/master.tar.gz") {
   src = ./.;
 }).shellNix