diff --git a/pills/08-generic-builders.xml b/pills/08-generic-builders.xml
index 2a34f71..fe70c11 100644
--- a/pills/08-generic-builders.xml
+++ b/pills/08-generic-builders.xml
@@ -34,7 +34,7 @@
       <link xlink:href="https://www.gnu.org/software/hello/">GNU hello world</link>,
       despite its name, is a simple yet complete project which uses autotools.
       Fetch the latest tarball here:
-      <link xlink:href="https://ftp.gnu.org/gnu/hello/hello-2.10.tar.gz">https://ftp.gnu.org/gnu/hello/hello-2.10.tar.gz</link>.
+      <link xlink:href="https://ftp.gnu.org/gnu/hello/hello-2.12.1.tar.gz">https://ftp.gnu.org/gnu/hello/hello-2.12.1.tar.gz</link>.
     </para>
 
     <para>
@@ -297,7 +297,7 @@
 
     <para>
       Out of this pill we managed to create a generic builder for autotools
-      projects, and a function <code>mkDerivation</code> that composes by default
+      projects, and a function <code>mymkDerivation</code> that composes by default
       the common components used in autotools projects instead of repeating them
       in all the packages we would write.
     </para>
diff --git a/pills/08/autotools-nix.txt b/pills/08/autotools-nix.txt
index 43264e1..fda44fa 100644
--- a/pills/08/autotools-nix.txt
+++ b/pills/08/autotools-nix.txt
@@ -1,9 +1,8 @@
 pkgs: attrs:
-  with pkgs;
   let defaultAttrs = {
-    builder = "${bash}/bin/bash";
+    builder = "${pkgs.bash}/bin/bash";
     args = [ ./builder.sh ];
-    baseInputs = [ gnutar gzip gnumake gcc coreutils gawk gnused gnugrep binutils.bintools ];
+    baseInputs = with pkgs; [ gnutar gzip gnumake gcc coreutils gawk gnused gnugrep binutils.bintools ];
     buildInputs = [];
     system = builtins.currentSystem;
   };
diff --git a/pills/08/hello-builder.txt b/pills/08/hello-builder.txt
index 14787f4..3ad635e 100644
--- a/pills/08/hello-builder.txt
+++ b/pills/08/hello-builder.txt
@@ -1,6 +1,6 @@
 export PATH="$gnutar/bin:$gcc/bin:$gnumake/bin:$coreutils/bin:$gawk/bin:$gzip/bin:$gnugrep/bin:$gnused/bin:$bintools/bin"
 tar -xzf $src
-cd hello-2.10
+cd hello-2.12.1
 ./configure --prefix=$out
 make
 make install
diff --git a/pills/08/hello-nix-darwin.txt b/pills/08/hello-nix-darwin.txt
index 735d816..79e8b1f 100644
--- a/pills/08/hello-nix-darwin.txt
+++ b/pills/08/hello-nix-darwin.txt
@@ -1,11 +1,13 @@
-with (import <nixpkgs> {});
-derivation {
-  name = "hello";
-  builder = "${bash}/bin/bash";
-  args = [ ./hello_builder.sh ];
-  inherit gnutar gzip gnumake coreutils gawk gnused gnugrep;
-  gcc = clang;
-  bintools = clang.bintools.bintools_bin;
-  src = ./hello-2.10.tar.gz;
-  system = builtins.currentSystem;
-}
+let
+  pkgs = import <nixpkgs> {};
+in
+  derivation {
+    name = "hello";
+    builder = "${pkgs.bash}/bin/bash";
+    args = [ ./hello_builder.sh ];
+    inherit (pkgs) gnutar gzip gnumake coreutils gawk gnused gnugrep;
+    gcc = pkgs.clang;
+    bintools = pkgs.clang.bintools.bintools_bin;
+    src = ./hello-2.12.1.tar.gz;
+    system = builtins.currentSystem;
+  }
diff --git a/pills/08/hello-nix-rev-1.txt b/pills/08/hello-nix-rev-1.txt
index 053e715..67b5efd 100644
--- a/pills/08/hello-nix-rev-1.txt
+++ b/pills/08/hello-nix-rev-1.txt
@@ -1,9 +1,11 @@
-with (import <nixpkgs> {});
-derivation {
-  name = "hello";
-  builder = "${bash}/bin/bash";
-  args = [ ./builder.sh ];
-  buildInputs = [ gnutar gzip gnumake gcc coreutils gawk gnused gnugrep binutils.bintools ];
-  src = ./hello-2.10.tar.gz;
-  system = builtins.currentSystem;
-}
+let
+  pkgs = import <nixpkgs> {};
+in
+  derivation {
+    name = "hello";
+    builder = "${pkgs.bash}/bin/bash";
+    args = [ ./builder.sh ];
+    buildInputs = with pkgs; [ gnutar gzip gnumake gcc coreutils gawk gnused gnugrep binutils.bintools ];
+    src = ./hello-2.12.1.tar.gz;
+    system = builtins.currentSystem;
+  }
diff --git a/pills/08/hello-nix-rev-2.txt b/pills/08/hello-nix-rev-2.txt
index c216fb1..403b783 100644
--- a/pills/08/hello-nix-rev-2.txt
+++ b/pills/08/hello-nix-rev-2.txt
@@ -1,7 +1,8 @@
 let
   pkgs = import <nixpkgs> {};
   mkDerivation = import ./autotools.nix pkgs;
-in mkDerivation {
-  name = "hello";
-  src = ./hello-2.10.tar.gz;
-}
+in 
+  mkDerivation {
+    name = "hello";
+    src = ./hello-2.12.1.tar.gz;
+  }
diff --git a/pills/08/hello-nix.txt b/pills/08/hello-nix.txt
index 80377bc..ba7f10a 100644
--- a/pills/08/hello-nix.txt
+++ b/pills/08/hello-nix.txt
@@ -1,10 +1,12 @@
-with (import <nixpkgs> {});
-derivation {
-  name = "hello";
-  builder = "${bash}/bin/bash";
-  args = [ ./hello_builder.sh ];
-  inherit gnutar gzip gnumake gcc coreutils gawk gnused gnugrep;
-  bintools = binutils.bintools;
-  src = ./hello-2.10.tar.gz;
-  system = builtins.currentSystem;
-}
+let
+  pkgs = import <nixpkgs> {};
+in
+  derivation {
+    name = "hello";
+    builder = "${pkgs.bash}/bin/bash";
+    args = [ ./hello_builder.sh ];
+    inherit (pkgs) gnutar gzip gnumake gcc coreutils gawk gnused gnugrep;
+    bintools = pkgs.binutils.bintools;
+    src = ./hello-2.12.1.tar.gz;
+    system = builtins.currentSystem;
+  }