diff --git a/.travis.yml b/.travis.yml
index c2f884d..d5ce50a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,4 @@
-sudo: required
-services:
-  - docker
+language: nix
 branches:
   only:
   - master
@@ -19,7 +17,7 @@ script:
     echo "SITEURL = 'http://weekly.nixos.org'" >> pelicanconf.py;
     echo "WITH_FUTURE_DATES = True" >> pelicanconf.py;
   fi
-- ./travis-build -Q default.nix;
+- nix-build -Q default.nix;
 
 after_success:
 - env
diff --git a/content/2018/04-nixconf0218-nix-core-team-binary-cache-improvements.rst b/content/2018/04-nixconf0218-nix-core-team-binary-cache-improvements.rst
new file mode 100644
index 0000000..9b85b17
--- /dev/null
+++ b/content/2018/04-nixconf0218-nix-core-team-binary-cache-improvements.rst
@@ -0,0 +1,130 @@
+#04 - NixCon2018, Nix Core Team, binary cache improvements
+##########################################################
+
+:date: 2018-07-25
+:description: back in black
+
+
+.. -----------------------------------------------------------------------------
+.. (OPTIONAL) Introduction text, as an editor this is your space to express
+   opinions
+.. -----------------------------------------------------------------------------
+
+NixOS weekly project is rebooting, expect a newsletter every
+Wednesday in the morning (European timezone).
+
+You're more than welcome to submit new items with a short description
+on `latest pull request`_
+
+.. _`latest pull request`: https://github.com/NixOS/nixos-weekly/pulls
+
+Domen
+
+.. -----------------------------------------------------------------------------
+.. News - Special items that happen in community
+.. -----------------------------------------------------------------------------
+
+News
+====
+
+.. - Example news item title `with link`_
+..
+..   News item description (optional)
+..
+.. .. _`with link`: http://example.com
+
+
+- `Patreon to support the NixOS OfBorg infrastructure`_
+
+  This supports Graham's infrastructure costs for the OfBorg tooling.
+
+- `Introducing the Nix Core Team`_
+
+- `NixCon2018 call for proposals`_
+
+- `cache.nixos.org now more local`_
+
+- `Announcing Cachix - Binary Cache as a Service`_
+
+
+.. _`Patreon to support the NixOS OfBorg infrastructure`: https://www.patreon.com/ofborg/overview
+.. _`Introducing the Nix Core Team`: https://github.com/NixOS/rfcs/pull/25
+.. _`NixCon2018 call for proposals`: https://nixcon2018.org/#call-for-paper
+.. _`cache.nixos.org now more local`: https://grahamc.com/blog/cache-nixos-org-now-more-local
+.. _`Announcing Cachix - Binary Cache as a Service`: https://domenkozar.com/2018/06/01/announcing-cachix-binary-cache-as-a-service/
+
+.. -----------------------------------------------------------------------------
+.. Jobs - list of available Nix related jobs
+.. -----------------------------------------------------------------------------
+
+.. -----------------------------------------------------------------------------
+.. Reading - List of blog posts, collected (hopefully) via planet.nixos.org
+.. -----------------------------------------------------------------------------
+
+
+Reading
+=======
+
+.. - `Example blog post title`_
+..
+..   optional extra description
+..
+.. .. _`blog post title`: http://example.com
+
+
+- `Painlessly developing Python on NixOS with pipenv`_
+
+- `A more realistic public Disnix example`_
+
+- `nix-language-atlas-javascript`_
+
+- `filterSource from .gitignore`_
+
+- `Developing with Nix`_
+
+.. _`Painlessly developing Python on NixOS with pipenv`: http://sid-kap.github.io/posts/2018-03-08-nix-pipenv.html
+.. _`A more realistic public Disnix example`: http://sandervanderburg.blogspot.de/2018/02/a-more-realistic-public-disnix-example.html
+.. _`nix-language-atlas-javascript`: https://lastlog.de/blog/posts/nix-language-atlas-javascript.html
+.. _`filterSource from .gitignore`: https://github.com/siers/nix-gitignore
+.. _`developing with Nix`: https://matrix.ai/2018/03/24/developing-with-nix/
+
+.. -----------------------------------------------------------------------------
+.. Tooling - List of useful tools (or their updates)
+.. -----------------------------------------------------------------------------
+
+Tooling
+=======
+
+.. - `Example tool with a link to it`_
+..
+..   Description what tool does, why it was created, or what is new since last
+..   time.
+..
+.. .. _`tool name with a link to it`: http://example.com
+
+- `terraform-provider-nixos`_: Terraform provider for NixOS and NixOps
+
+- `nix-bundle`_:  Bundle Nix derivations to run anywhere!
+
+- `hocker`_: Utilities for interacting with the docker registry and generating nix build instructions
+
+.. _`terraform-provider-nixos`: https://github.com/tweag/terraform-provider-nixos
+.. _`nix-bundle`: https://github.com/matthewbauer/nix-bundle
+.. _`hocker`: https://github.com/awakesecurity/hocker
+
+
+.. -----------------------------------------------------------------------------
+.. Events / Meetups - regular or one time announcements of FUTURE events
+.. -----------------------------------------------------------------------------
+
+
+Contribute to NixOS Weekly Newsletter
+=====================================
+
+This work would not be possible without the many contributions of the community.
+
+You can help too! Create or comment on the `pull request`_ for the next edition
+or look at the `issue tracker`_ to add other improvements.
+
+.. _`pull request`: https://github.com/NixOS/nixos-weekly/pulls
+.. _`issue tracker`: https://github.com/NixOS/nixos-weekly/issues
diff --git a/default.nix b/default.nix
index 093e2a3..1007c42 100644
--- a/default.nix
+++ b/default.nix
@@ -1,6 +1,4 @@
-let importFromGithub = import ./importFromGithub.nix; in
-{ pkgs ? importFromGithub ./nixpkgs.json {}
-, pkgs-python ? importFromGithub ./nixpkgs-python.json { inherit pkgs; }
+{ pkgs ? import ./nixpkgs.nix
 }:
 
 pkgs.stdenv.mkDerivation {
@@ -9,9 +7,9 @@ pkgs.stdenv.mkDerivation {
     builtins.filterSource
       (path: type: baseNameOf path != "result")
       ./.;
-  buildInputs =
-    [ pkgs-python.pelican.packages.pelican
-      pkgs-python.pelican.packages.livereload
+  buildInputs = with pkgs.python3Packages;
+    [ pelican
+      livereload
     ];
   buildPhase = ''
     pelican
diff --git a/importFromGithub.nix b/importFromGithub.nix
deleted file mode 100644
index 9968ca1..0000000
--- a/importFromGithub.nix
+++ /dev/null
@@ -1,61 +0,0 @@
-file:
-
-let
-
-  fetchFromGithub =
-    # from https://nixos.wiki/wiki/How_to_fetch_Nixpkgs_with_an_empty_NIX_PATH
-    { rev                             # The Git revision of nixpkgs to fetch
-    , sha256                          # The SHA256 of the downloaded data
-    , owner ?  "NixOS"
-    , repo ? "nixpkgs"
-    , system ? builtins.currentSystem # This is overridable if necessary
-    }:
-    
-    with {
-      ifThenElse = { bool, thenValue, elseValue }: (
-        if bool then thenValue else elseValue);
-    };
-    
-    ifThenElse {
-      bool = (0 <= builtins.compareVersions builtins.nixVersion "1.12");
-    
-      # In Nix 1.12, we can just give a `sha256` to `builtins.fetchTarball`.
-      thenValue = (
-        builtins.fetchTarball {
-          url = "https://github.com/${owner}/${repo}/archive/${rev}.tar.gz";
-          inherit sha256;
-        });
-    
-      # This hack should at least work for Nix 1.11
-      elseValue = (
-        (rec {
-          tarball = import <nix/fetchurl.nix> {
-            url = "https://github.com/${owner}/${repo}/archive/${rev}.tar.gz";
-            inherit sha256;
-          };
-    
-          builtin-paths = import <nix/config.nix>;
-          
-          script = builtins.toFile "nixpkgs-unpacker" ''
-            "$coreutils/mkdir" "$out"
-            cd "$out"
-            "$gzip" --decompress < "$tarball" | "$tar" -x --strip-components=1
-          '';
-    
-          nixpkgs = builtins.derivation {
-            name = "nixpkgs-${builtins.substring 0 6 rev}";
-    
-            builder = builtins.storePath builtin-paths.shell;
-    
-            args = [ script ];
-    
-            inherit tarball system;
-    
-            tar       = builtins.storePath builtin-paths.tar;
-            gzip      = builtins.storePath builtin-paths.gzip;
-            coreutils = builtins.storePath builtin-paths.coreutils;
-          };
-        }).nixpkgs);
-    };
-
-in import (fetchFromGithub (builtins.fromJSON (builtins.readFile file)))
diff --git a/nix-build-docker b/nix-build-docker
deleted file mode 100755
index 6080c3c..0000000
--- a/nix-build-docker
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/usr/bin/env sh
-
-rm -rf result
-nix-build $@
-
-mv result result.link
-mkdir result
-cp -r result.link/* result
-chown -R $HOST_USER_ID:$HOST_GROUP_ID result
-rm -rf result.link
diff --git a/nixpkgs-python.json b/nixpkgs-python.json
deleted file mode 100644
index a21dfb6..0000000
--- a/nixpkgs-python.json
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-  "owner": "garbas",
-  "repo": "nixpkgs-python",
-  "rev": "000e638ab79687130ef5088df975be6bc9507150",
-  "sha256": "11i215j0s0smi25yws74h2m2b84jpf89nj0m63smy1hv39gf28lr"
-}
diff --git a/nixpkgs.json b/nixpkgs.json
deleted file mode 100644
index 5a5a04f..0000000
--- a/nixpkgs.json
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-  "owner": "NixOS",
-  "repo": "nixpkgs-channels",
-  "rev": "ade98dc442ea78e9783d5e26954e64ec4a1b2c94",
-  "sha256": "047p5n3dk460s940ms8bih0i0dqmy4nlw0ylz9ysni97jk2xdpwk"
-}
diff --git a/nixpkgs.nix b/nixpkgs.nix
new file mode 100644
index 0000000..b3ddf86
--- /dev/null
+++ b/nixpkgs.nix
@@ -0,0 +1,9 @@
+let
+  fetchTarball = { url, sha256 }@attrs:
+    if builtins.lessThan builtins.nixVersion "1.12"
+    then builtins.fetchTarball { inherit url; }
+    else builtins.fetchTarball attrs;
+in import (fetchTarball {
+  url = "https://github.com/NixOS/nixpkgs/archive/b619e0b016c5c79920aa06b78ccf936e56eaf45d.tar.gz";
+  sha256 = "1bvnw9dvcbm69s9xbb2npx42zns6zq7jwang8d865pnzb0clf5sv";
+}) { config = {}; overlays = []; }
diff --git a/travis-build b/travis-build
deleted file mode 100755
index 2918eb0..0000000
--- a/travis-build
+++ /dev/null
@@ -1,9 +0,0 @@
-#!/usr/bin/env sh
-
-docker run \
-       -e HOST_USER_ID=$(id -u $USER) \
-       -e HOST_GROUP_ID=$(id -g $USER) \
-       -v $PWD:/mnt \
-       -w /mnt \
-       nixos/nix:1.11.14 \
-       ./nix-build-docker