build failed on Ubuntu 18.04
Hi, I've downloaded the current master branch and tried to compile it, but I get a build error
error: failed to run custom build command for `alsa-sys v0.1.1 (https://github.com/desttinghim/cpal?rev=e7c086d0afc368a888ad133c3b1d928b16986130#e7c086d0)`
Caused by:
process didn't exit successfully: `/home/burli/dev/rust/veloren/target/debug/build/alsa-sys-c55567d57661de6f/build-script-build` (exit code: 101)
--- stderr
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: "`\"pkg-config\" \"--libs\" \"--cflags\" \"alsa\"` did not exit successfully: exit code: 1\n--- stderr\nPackage alsa was not found in the pkg-config search path.\nPerhaps you should add the directory containing `alsa.pc\'\nto the PKG_CONFIG_PATH environment variable\nNo package \'alsa\' found\n"', src/libcore/result.rs:999:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
warning: build failed, waiting for other jobs to finish...
error: build failed
I followed all steps in the book.
I have no idea how to fix this