Pin backend (#145)

Author: Hofer-Julian

crates/pixi-build-rust/pixi.toml

@@ -17,7 +17,7 @@ version = "0.1.8"
 pixi-build-rust = { path = "." }
 
 [package.build]
-backend = { name = "pixi-build-rust", version = "0.1.6" }
+backend = { name = "pixi-build-rust", version = "==0.1.6" }
 channels = ["https://prefix.dev/pixi-build-backends", "conda-forge"]
 
 [package.target.unix.host-dependencies]