--- /dev/null
+The build currently fails with:
+
+[..]
+
+# Build final cargo binary and docs
+/usr/bin/make
+make[2]: Entering directory '/build/cargo-0.17.0'
+/usr/bin/rustc -V
+rustc 1.15.1
+/build/cargo-0.17.0/cargo-stage0 --version
+cargo 0.15.0 (built 2016-11-26)
+/build/cargo-0.17.0/cargo-stage0 build --target x86_64-unknown-linux-gnu --manifest-path /build/cargo-0.17.0//Cargo.toml --release --verbose
+warning: custom registry support via the `registry.index` configuration is being removed, this functionality will not work in the future
+ Updating registry `file:///build/cargo-0.17.0/vendor/index`
+error: no matching package named `backtrace` found (required by `error-chain`)
+location searched: registry file:///build/cargo-0.17.0/vendor/index
+version required: *
+Makefile:128: recipe for target 'cargo-x86_64-unknown-linux-gnu' failed
+
+[..]
+
+We need to fix d/cargo-vendor-pack.py and probably -unpack.py as well