Streaming git repos into NixOS

error

error: while evaluating the attribute ‘buildCommand’ of the derivation ‘nixos-system-meso-17.03.1395.9b948ea439’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpk
gs/nixos/modules/system/activation/top-level.nix:107:7:
while evaluating the attribute ‘sources’ of the derivation ‘etc’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/nixos/modules/system/etc/etc.nix:12:5:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/nixos/modules/system/etc/etc.nix:20:20, called from undefined position:
while evaluating the attribute ‘source’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/attrsets.nix:199:44:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:75:45, called from /nix/var/nix/profiles/per-user/root/cha
nnels/nixos/nixpkgs/lib/attrsets.nix:199:52:
while evaluating the attribute ‘value’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:300:9:
while evaluating the option `environment.etc.systemd/system.source':
while evaluating the attribute ‘mergedValue’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:327:5:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:327:32, called from /nix/var/nix/profiles/per-user/root/ch
annels/nixos/nixpkgs/lib/modules.nix:327:19:
while evaluating ‘check’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/types.nix:168:15, called from /nix/var/nix/profiles/per-user/root/channels/nixos/
nixpkgs/lib/modules.nix:328:10:
while evaluating the attribute ‘buildCommand’ of the derivation ‘system-units’ at /nix/store/18bnvwv4cywkydrljzygcjxgz71vbr1c-nixos-17.03.1395.9b948ea439/nixos/pkgs/build-s
upport/trivial-builders.nix:7:14:
while evaluating the attribute ‘text’ of the derivation ‘unit-dbus.service’ at /nix/store/18bnvwv4cywkydrljzygcjxgz71vbr1c-nixos-17.03.1395.9b948ea439/nixos/pkgs/build-supp
ort/trivial-builders.nix:7:14:
while evaluating the attribute ‘text’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/attrsets.nix:199:44:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:75:45, called from /nix/var/nix/profiles/per-user/root/cha
nnels/nixos/nixpkgs/lib/attrsets.nix:199:52:
while evaluating the attribute ‘value’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:300:9:
while evaluating the option `systemd.units.dbus.service.text':
while evaluating the attribute ‘isDefined’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:332:5:
hile evaluating ‘filterOverrides’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:407:21, called from /nix/var/nix/profiles/per-user/root/cha
nnels/nixos/nixpkgs/lib/modules.nix:316:18:
while evaluating ‘concatMap’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/lists.nix:79:18, called from /nix/var/nix/profiles/per-user/root/channels/nix
os/nixpkgs/lib/modules.nix:413:8:
while evaluating ‘concatMap’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/lists.nix:79:18, called from /nix/var/nix/profiles/per-user/root/channels/nix
os/nixpkgs/lib/modules.nix:311:17:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:311:28, called from undefined position:
while evaluating ‘dischargeProperties’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:374:25, called from /nix/var/nix/profiles/per-user/root
/channels/nixos/nixpkgs/lib/modules.nix:312:62:
while evaluating the attribute ‘value’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:204:48:
while evaluating the attribute ‘config.text’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/nixos/modules/system/boot/systemd.nix:326:7:
while evaluating ‘commonUnitText’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/nixos/modules/system/boot/systemd.nix:310:20, called from /nix/var/nix/profi
les/per-user/root/channels/nixos/nixpkgs/nixos/modules/system/boot/systemd.nix:326:14:
while evaluating ‘attrsToSection’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/nixos/modules/system/boot/systemd-lib.nix:90:20, called from /nix/var/nix/pr
ofiles/per-user/root/channels/nixos/nixpkgs/nixos/modules/system/boot/systemd.nix:312:9:
while evaluating ‘mapAttrsToList’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/attrsets.nix:223:23, called from /nix/var/nix/profiles/per-user/root/cha
nnels/nixos/nixpkgs/nixos/modules/system/boot/systemd-lib.nix:91:33:
while evaluating the attribute ‘unitConfig’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/attrsets.nix:199:44:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:75:45, called from /nix/var/nix/profiles/per-user/root/cha
nnels/nixos/nixpkgs/lib/attrsets.nix:199:52:
while evaluating the attribute ‘value’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:300:9:
while evaluating the option `systemd.services.dbus.unitConfig':
while evaluating the attribute ‘mergedValue’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:327:5:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:327:32, called from /nix/var/nix/profiles/per-user/root/ch
annels/nixos/nixpkgs/lib/modules.nix:327:19:
while evaluating ‘merge’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/types.nix:201:20, called from /nix/var/nix/profiles/per-user/root/channels/nixos/
nixpkgs/lib/modules.nix:330:8:
while evaluating ‘mapAttrs’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/attrsets.nix:198:17, called from /nix/var/nix/profiles/per-user/root/channels/
nixos/nixpkgs/lib/types.nix:202:9:
while evaluating ‘filterAttrs’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/attrsets.nix:115:23, called from /nix/var/nix/profiles/per-user/root/channe
ls/nixos/nixpkgs/lib/types.nix:202:35:
while evaluating ‘concatMap’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/lists.nix:79:18, called from /nix/var/nix/profiles/per-user/root/channels/nix
os/nixpkgs/lib/attrsets.nix:116:18:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/attrsets.nix:116:29, called from undefined position:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/types.nix:202:51, called from /nix/var/nix/profiles/per-user/root/chan
nels/nixos/nixpkgs/lib/attrsets.nix:116:62:
while evaluating the attribute ‘X-Restart-Triggers’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/attrsets.nix:334:7:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/types.nix:202:86, called from /nix/var/nix/profiles/per-user/root/chan
nels/nixos/nixpkgs/lib/attrsets.nix:334:15:
while evaluating the attribute ‘optionalValue’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:334:5:
while evaluating ‘filterOverrides’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:407:21, called from /nix/var/nix/profiles/per-user/root/cha
nnels/nixos/nixpkgs/lib/modules.nix:316:18:
while evaluating ‘concatMap’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/lists.nix:79:18, called from /nix/var/nix/profiles/per-user/root/channels/nix
os/nixpkgs/lib/modules.nix:413:8:
while evaluating ‘concatMap’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/lists.nix:79:18, called from /nix/var/nix/profiles/per-user/root/channels/nix
os/nixpkgs/lib/modules.nix:311:17:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:311:28, called from undefined position:
while evaluating ‘dischargeProperties’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:374:25, called from /nix/var/nix/profiles/per-user/root
/channels/nixos/nixpkgs/lib/modules.nix:312:62:
while evaluating the attribute ‘value’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/types.nix:207:55:
while evaluating the attribute ‘X-Restart-Triggers’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/nixos/modules/system/boot/systemd.nix:227:13:
while evaluating the attribute ‘serviceDirectories’ of the derivation ‘dbus-1’ at /nix/store/18bnvwv4cywkydrljzygcjxgz71vbr1c-nixos-17.03.1395.9b948ea439/nixos/pkgs/build-s
upport/trivial-builders.nix:7:14:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/types.nix:180:14, called from undefined position:
while evaluating the attribute ‘value’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:335:27:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:327:32, called from /nix/var/nix/profiles/per-user/root/ch
annels/nixos/nixpkgs/lib/modules.nix:327:19:
while evaluating ‘check’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/types.nix:168:15, called from /nix/var/nix/profiles/per-user/root/channels/nixos/
nixpkgs/lib/modules.nix:328:10:
while evaluating the attribute ‘pkgs’ of the derivation ‘system-path’ at /nix/store/18bnvwv4cywkydrljzygcjxgz71vbr1c-nixos-17.03.1395.9b948ea439/nixos/pkgs/build-support/tr
ivial-builders.nix:7:14:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/types.nix:180:14, called from undefined position:
while evaluating the attribute ‘value’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:335:27:
while evaluating anonymous function at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/modules.nix:327:32, called from /nix/var/nix/profiles/per-user/root/ch
annels/nixos/nixpkgs/lib/modules.nix:327:19:
while evaluating ‘check’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/types.nix:155:15, called from /nix/var/nix/profiles/per-user/root/channels/nixos/
nixpkgs/lib/modules.nix:328:10:
while evaluating ‘isStorePath’ at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/strings.nix:442:17, called from /nix/var/nix/profiles/per-user/root/channel
s/nixos/nixpkgs/lib/types.nix:155:36:
cannot coerce a function to a string, at /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/lib/strings.nix:442:44

gitrepo

Structure of the git repo:

|-bin/
|-lib/
|-nix/
   |-default.nix
   |-derivation.nix
   |-module.nix
   
based on https://stackoverflow.com/a/44621588/973433

test repo: https://github.com/ixxie/flux

streams.nix

{ config, pkgs,  ... }: 

with builtins;

let

    streamsDir = ../streams;

    streamFiles = map 
                    (file: streamsDir + ("/" + file) ) 
                    (attrNames (readDir streamsDir));

    fetchStream = 
            (jsonFile: 
                pkgs.fetchgit 
                        (removeAttrs
                            (fromJSON
                                (readFile jsonFile)
                            )
                            [ "date" "fetchSubmodules" ]
                        )
            );

    importStream =
            (stream:
                import "${stream}/nix/derivation.nix" {}
            );

    streams = map fetchStream streamFiles;
    pkglist = map importStream streams;

in

{ 
    environment = 
        {
            systemPackages = pkglist;
        };
}