当‘`nix构建hello.nix`时失败

Question

我遵循了在http://lethalman.blogspot.com/2014/08/nix-pill-8-generic-builders.html上构建GNU的步骤，下面是我用来构建GNUHello2.9的文件：

$ wget -c http://ftp.gnu.org/gnu/hello/hello-2.9.tar.gz

hello.nix：

$ cat hello.nix
let
  pkgs = import <nixpkgs> {};
  mkDerivation = import ./autotools.nix pkgs;
in mkDerivation {
  name = "hello";
  src = ./hello-2.9.tar.gz;
}

autotools.nix：

$ cat autotools.nix
pkgs: attrs:
  with pkgs;
  let defaultAttrs = {
    builder = "${bash}/bin/bash";
    args = [ ./builder.sh ];
    baseInputs = [ gnutar gzip gnumake gcc binutils coreutils gawk gnused gnugrep ];
    buildInputs = [];
    system = builtins.currentSystem;
  };
  in
  derivation (defaultAttrs // attrs)

builder.sh：

$ cat builder.sh
set -e
unset PATH
for p in $buildInputs; do
  export PATH=$p/bin${PATH:+:}$PATH
done

tar -xf $src

for d in *; do
  if [ -d "$d" ]; then
    cd "$d"
    break
  fi
done

./configure --prefix=$out
make
make install

错误信息：

$ nix-build hello.nix
these derivations will be built:
  /nix/store/d84l57agx3rmw00lxs8gjlw8srmx1bh9-hello.drv
building '/nix/store/d84l57agx3rmw00lxs8gjlw8srmx1bh9-hello.drv'...
/nix/store/vv3xqdggviqqbvym25jf2pwv575y9j1r-builder.sh: line 7: tar: No such file or directory
builder for '/nix/store/d84l57agx3rmw00lxs8gjlw8srmx1bh9-hello.drv' failed with exit code 127
error: build of '/nix/store/d84l57agx3rmw00lxs8gjlw8srmx1bh9-hello.drv' failed

在gnutar中似乎有autotools.nix，但是构建者仍然抱怨tar: No such file or directory，为什么会这样？

Answer 1

问题可能是gnutar在baseInputs列表中，而您正在构建路径的buildInputs列表完全是空的，因此您的路径上什么都不会出现。尝试更改shell脚本中的for行，以便使用两个列表的连接构建路径：

for p in $baseInputs $buildInputs; do

您可以将echo $PATH添加到构建器脚本中，以调试类似的问题。

这就是博文作者在这篇文章中要求你做的事情：

通过在for循环中添加builder.sh和$buildInputs来完成新的$buildInputs。