these 6 derivations will be built:
  /nix/store/fy5yj3kp1cqgwcx05xw2517fh3274c4s-rtmidi-5.0.0.drv
  /nix/store/m59v1yb82z2n7q68rmcry1wivcrnfyda-VCV-Rack.desktop.drv
  /nix/store/n96ljiq6mxrnr5pa1gd6kq4yh4bhc2c7-filesystem-1.5.12.drv
  /nix/store/r3ghsd4l8yqvwryz3ca5p3n3vppd77jw-vcv-rtaudio-unstable-2020-01-30.drv
  /nix/store/szd9yhxgmqih5lzliz0sbj3bcvxc3yqk-libicns-0.8.1.drv
  /nix/store/6093bl23qmvidv87bwmp65wjnyxivv2x-VCV-Rack-2.2.1.drv
these 14 paths will be fetched (1.0 MiB download, 3.0 MiB unpacked):
  /nix/store/f45svk5vi1ssl5ji9ff8wfizdmwm2kzj-0001-rtmidi-Use-posix-sched_yield-instead-of-pthread_yield.patch
  /nix/store/9c56vbizrknq9c1fzjacn02wsl0rp4wp-0002-rtmidi-include-TargetConditionals.h-on-Apple-platforms.patch
  /nix/store/7ik4y9inh1zb1r29v9w66h1x6grcpil3-acl-2.3.1-bin
  /nix/store/mmrgqmadaj4ad0yhln9bpqrv1nw3h8zl-acl-2.3.1-dev
  /nix/store/j3zi5d7bxlv6bs8m8k0jlljc0c5vjq77-glfw-3.3.8
  /nix/store/yhk2kd6isldld8y5pnh2l7x5q0nvkzn0-libarchive-3.6.1
  /nix/store/4kn7whixx8sm2pirljz9pblf4q4lcchm-libarchive-3.6.1-dev
  /nix/store/364qaiigxnyldrqmpacgv1yhni4zakh3-libicns-0.8.1.tar.gz
  /nix/store/55zam4f5cwk5m6hynb68z2x77iyxy8x3-libsamplerate-0.1.9-bin
  /nix/store/r7ggcrdkv5baphv8i3k6yni4fsn838qp-libsamplerate-0.1.9-dev
  /nix/store/6i5pi0fk3ry5m49q0vx5vkkjj9h8fj6g-source
  /nix/store/ddczzzzvx2ifqrv4w742h88cg6mxqn5m-source
  /nix/store/s692fi4pqnhy1ghdxxpa0l1y3k2skp6m-speexdsp-1.2.1-dev
  /nix/store/p13ngg4a8rjwv4dygq98873pcnpg1fpr-support-libopenjp2.patch
error: Cannot build '/nix/store/6093bl23qmvidv87bwmp65wjnyxivv2x-VCV-Rack-2.2.1.drv'.
       Reason: builder failed with exit code 2.
       Output paths:
         /nix/store/2l4409xm1snrashh9cyc23xjnk14qw3z-VCV-Rack-2.2.1
       Last 11 log lines:
       > unpacking sources
       > unpacking source archive /nix/store/y78x1lgvh7hhm2dip8rz5xllnpsrbd0z-source
       > source root is source
       > patching sources
       > applying patch /nix/store/9gb2m19gxadjbadjznxcw1wshlp1l1n3-rack-minimize-vendoring.patch
       > patching file Makefile
       > configuring
       > no configure script, doing nothing
       > building
       > build flags: SHELL=/nix/store/mysyx2ms2gm0n425gsz1hvwfk1jn1f9c-bash-5.1-p16/bin/bash all plugins
       > arch.mk:17: *** Could not determine CPU architecture of i686-unknown-linux-gnu.  Stop.
       For full logs, run:
         nix log /nix/store/6093bl23qmvidv87bwmp65wjnyxivv2x-VCV-Rack-2.2.1.drv