[Nix-dev] builder for ‘*.drv’ failed to produce output path ‘*’

[Tomasz Kontusz]

You need to create $out in your builder. Just "cp -r ./build $out" after 
the "make pgloader" will be a good start - at least you'll see if it's 
usable :-)

On 13.12.2015 23:39, Tinker wrote:
> Hi
>
> I'm trying to write a nix package for pgloader (a db migration tool
> written by someone else and can be found at
> https://github.com/dimitri/pgloader).
>
> When I run it as `nix-build -A pgloader` then I get:
>
> builder for ‘/nix/store/gz38vqm47i0vfyiqdz6qmqyx7ywprji5-pgloader-3.2.2.drv’
> failed to produce output path
> ‘/nix/store/v5ya763xia00lp40yx6z5c0h6l1cvla2-pgloader-3.2.2’
> error: build of
> ‘/nix/store/gz38vqm47i0vfyiqdz6qmqyx7ywprji5-pgloader-3.2.2.drv’
> failed
>
> I'm trying to figure out what it means but maybe someone can already
> shed a light?
>
> The package does not have a 'make install', is that why it's
> complaining out the missing output path?
> What would be the way forward given I don't own the source of the
> utility itself?
>
> default.nix (other comments welcome as well):
> ===
> { stdenv, fetchurl, sbcl, unzip, curl, git, openssl, sqlite, freetds,
> lispPackages, cacert }:
>
> stdenv.mkDerivation {
>    name = "pgloader-3.2.2";
>    buildInputs = [ sbcl unzip curl git openssl sqlite freetds
> lispPackages.cl-ssl cacert ];
>    LD_LIBRARY_PATH="${lispPackages.cl-ssl}/lib:${openssl}/lib:${sqlite}/lib:${freetds}/lib";
>    SSL_CERT_FILE=/etc/ssl/certs/ca-bundle.crt;
>    CURL_CA_BUNDLE=/etc/ssl/certs/ca-bundle.crt;
>
>    builder = builtins.toFile "builder.sh" "
>      source $stdenv/setup
>
>      PATH=$sbcl/bin:$PATH
>
>      unzip $src
>      cd pgloader-*
>      sed -i 's/COMPRESS_CORE ?= yes/COMPRESS_CORE ?= no/' Makefile
>      make COMPRESS_CORE=no pgloader
>    ";
>
>    src = fetchurl {
>      url = https://github.com/dimitri/pgloader/archive/master.zip;
>      md5 = "8b93075a1a5848a674101d90850dc90e";
>      #url = https://github.com/dimitri/pgloader/archive/v3.2.2.zip;
>      #md5 = "4d00eb55bf7dbea0a8e55248d2bbb96d";
>    };
>    inherit sbcl;
> }
> ===
>
> t
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