diff --git a/nix/shells.nix b/nix/shells.nix
index 5b08e02..076675b 100644
--- a/nix/shells.nix
+++ b/nix/shells.nix
@@ -32,6 +32,7 @@
           cfg.installationScript
           ''
             export WIRE_TEST_DIR=$(realpath ./tests/rust)
+            export SQLX_OFFLINE=true
           ''
         ];
       };