diff --git a/.cargo/config.toml b/.cargo/config.toml
new file mode 100644
index 0000000..ed1e141
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,2 @@
+[build]
+rustflags = [ "--cfg", "procmacro2_semver_exempt" ]
diff --git a/.gitignore b/.gitignore
index dd176ff..56c01cd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,7 @@
 *
 
+!.cargo/
+
 !embd/
 !embd/src/