trying to fix osx64
#!/bin/bash
# install pineappl rust library with c-api support
-export PKG_CONFIG_PATH=$BUILD_PREFIX/lib/pkgconfig:$PKG_CONFIG_PATH
+export PKG_CONFIG_PATH=$PREFIX/lib/pkgconfig:$PKG_CONFIG_PATH
cargo install cargo-c
cd pineappl_capi
cargo cinstall --release --prefix=$PREFIX
