unpacking source archive /nix/store/69l9avy20ipxf1b024kzkzmvzyjzl17f-mitmproxy-2.0.2-linux.tar.gz
source root is .
setting SOURCE_DATE_EPOCH to timestamp 1495041619 of file ./env-vars
warning: file ./env-vars may be generated; SOURCE_DATE_EPOCH may be non-deterministic
installing
/nix/store/3gk36h524dq8y5q5v8f7fcgm0v70pijd-stdenv/setup: line 905: $'\r': command not found
builder for ‘/nix/store/7iigbzrmym5mgbzaxpg5g3invv1fqng5-mitmproxy.drv’ failed with exit code 127
cannot build derivation ‘/nix/store/425ryj1qnja96d4wmm6j5i0jcp762jg7-myEnv.drv’: 1 dependencies couldn't be built