diff --git a/.gitignore b/.gitignore
index e83928f..6d0451e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,4 @@ content/references/supertext_*.mkd
 
 # backup
 video-backup
+result
diff --git a/maintenance/Makefile b/maintenance/Makefile
new file mode 100644
index 0000000..8bdcf9a
--- /dev/null
+++ b/maintenance/Makefile
@@ -0,0 +1,2 @@
+default.nix: generate.sh
+	./generate.sh | tee default.nix
diff --git a/maintenance/default.nix b/maintenance/default.nix
new file mode 100644
index 0000000..f9d6bf4
--- /dev/null
+++ b/maintenance/default.nix
@@ -0,0 +1,173 @@
+{ pkgs ? import <nixpkgs> {}
+}: let
+  inherit (pkgs) 
+    callPackage buildRubyGem lib ruby_2_2 libtidy
+    perlPackages pythonPackages glibcLocales;
+  inherit (lib) optionalAttrs hasAttr mapAttrs;
+  hotfix = mapAttrs (_: f: f {}) (callPackage <nixpkgs/pkgs/development/interpreters/ruby/bundler-env/default-gem-config.nix> {}) // {
+    tidy_ffi = {
+      postInstall = ''
+        substituteInPlace $out/lib/ruby/gems/2.2.0/gems/tidy_ffi-0.1.6/lib/tidy_ffi/lib_tidy.rb --replace 'usr' ${libtidy}
+      '';
+    };
+  };
+  awesome_print = buildRubyGem ({
+    name    = ''awesome_print-1.6.1'';
+    sha256  = ''1vwgsgyyq87iwjxi8bwh56fj3bzx7x2vjv1m6yih1fbhnbcyi2qd'';
+    gemPath = [];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''awesome_print'' hotfix) hotfix.awesome_print);
+  builder = buildRubyGem ({
+    name    = ''builder-3.2.2'';
+    sha256  = ''14fii7ab8qszrvsvhz6z2z3i4dw0h41a62fjr2h1j8m41vbrmyv2'';
+    gemPath = [];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''builder'' hotfix) hotfix.builder);
+  erubis = buildRubyGem ({
+    name    = ''erubis-2.7.0'';
+    sha256  = ''1fj827xqjs91yqsydf0zmfyw9p4l2jz5yikg3mppz6d7fi8kyrb3'';
+    gemPath = [];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''erubis'' hotfix) hotfix.erubis);
+  image_size = buildRubyGem ({
+    name    = ''image_size-1.4.1'';
+    sha256  = ''0r42q2mfm2ab05qpl7l1smlj2pwx9v3cajy5j3xz67vs6fg49nmj'';
+    gemPath = [];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''image_size'' hotfix) hotfix.image_size);
+  kramdown = buildRubyGem ({
+    name    = ''kramdown-1.7.0'';
+    sha256  = ''070r81kz88zw28c8bs5p0p92ymn1nldci2fm1arkas0bnqrd3rna'';
+    gemPath = [];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''kramdown'' hotfix) hotfix.kramdown);
+  nanoc = buildRubyGem ({
+    name    = ''nanoc-3.7.5'';
+    sha256  = ''00i6h52mmgdgpv3wzb56sk5nn75cl6zvhhapszk12xrykhrhjhsh'';
+    gemPath = [cri ];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''nanoc'' hotfix) hotfix.nanoc);
+  cri = buildRubyGem ({
+    name    = ''cri-2.6.1'';
+    sha256  = ''0zzwvwzrrlmx6c5j7bqc63ib952h37i357xn97m3h8bjd7zyv79l'';
+    gemPath = [colored ];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''cri'' hotfix) hotfix.cri);
+  colored = buildRubyGem ({
+    name    = ''colored-1.2'';
+    sha256  = ''0b0x5jmsyi0z69bm6sij1k89z7h0laag3cb4mdn7zkl9qmxb90lx'';
+    gemPath = [];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''colored'' hotfix) hotfix.colored);
+  nokogiri = buildRubyGem ({
+    name    = ''nokogiri-1.6.6.2'';
+    sha256  = ''1j4qv32qjh67dcrc1yy1h8sqjnny8siyy4s44awla8d6jk361h30'';
+    gemPath = [mini_portile ];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''nokogiri'' hotfix) hotfix.nokogiri);
+  mini_portile = buildRubyGem ({
+    name    = ''mini_portile-0.6.2'';
+    sha256  = ''0h3xinmacscrnkczq44s6pnhrp4nqma7k056x5wv5xixvf2wsq2w'';
+    gemPath = [];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''mini_portile'' hotfix) hotfix.mini_portile);
+  org-ruby = buildRubyGem ({
+    name    = ''org-ruby-0.9.12'';
+    sha256  = ''0x69s7aysfiwlcpd9hkvksfyld34d8kxr62adb59vjvh8hxfrjwk'';
+    gemPath = [rubypants ];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''org-ruby'' hotfix) hotfix.org-ruby);
+  rubypants = buildRubyGem ({
+    name    = ''rubypants-0.2.0'';
+    sha256  = ''1vpdkrc4c8qhrxph41wqwswl28q5h5h994gy4c1mlrckqzm3hzph'';
+    gemPath = [];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''rubypants'' hotfix) hotfix.rubypants);
+  pygments.rb = buildRubyGem ({
+    name    = ''pygments.rb-0.6.3'';
+    sha256  = ''160i761q2z8kandcikf2r5318glgi3pf6b45wa407wacjvz2966i'';
+    gemPath = [posix-spawn yajl-ruby ];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''pygments.rb'' hotfix) hotfix.pygments.rb);
+  posix-spawn = buildRubyGem ({
+    name    = ''posix-spawn-0.3.9'';
+    sha256  = ''042i1afggy1sv2jmdjjjhyffas28xp2r1ylj5xfv3hchy3b4civ3'';
+    gemPath = [];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''posix-spawn'' hotfix) hotfix.posix-spawn);
+  yajl-ruby = buildRubyGem ({
+    name    = ''yajl-ruby-1.2.1'';
+    sha256  = ''0zvvb7i1bl98k3zkdrnx9vasq0rp2cyy5n7p9804dqs4fz9xh9vf'';
+    gemPath = [];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''yajl-ruby'' hotfix) hotfix.yajl-ruby);
+  sanitize = buildRubyGem ({
+    name    = ''sanitize-4.0.0'';
+    sha256  = ''0sk78s5ivpgf7yc6mxcqqs3jjyk8db3yc2rdj1ayi64yc2f5qi2n'';
+    gemPath = [crass nokogiri nokogumbo ];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''sanitize'' hotfix) hotfix.sanitize);
+  crass = buildRubyGem ({
+    name    = ''crass-1.0.2'';
+    sha256  = ''1c377r8g7m58y22803iyjgqkkvnnii0pymskda1pardxrzaighj9'';
+    gemPath = [];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''crass'' hotfix) hotfix.crass);
+  nokogumbo = buildRubyGem ({
+    name    = ''nokogumbo-1.4.1'';
+    sha256  = ''0s47jdvfqmcs8bggnk1i8cbrci0k548aygjdamfb9jgfqrl3l552'';
+    gemPath = [nokogiri ];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''nokogumbo'' hotfix) hotfix.nokogumbo);
+  sass = buildRubyGem ({
+    name    = ''sass-3.4.13'';
+    sha256  = ''0wxkjm41xr77pnfi06cbwv6vq0ypbni03jpbpskd7rj5b0zr27ig'';
+    gemPath = [];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''sass'' hotfix) hotfix.sass);
+  tidy_ffi = buildRubyGem ({
+    name    = ''tidy_ffi-0.1.6'';
+    sha256  = ''0mz8zr6xvfj2rhznydxqlkkgn9samxlwklc9v2z9bbzl4bzbddi5'';
+    gemPath = [ffi ];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''tidy_ffi'' hotfix) hotfix.tidy_ffi);
+  ffi = buildRubyGem ({
+    name    = ''ffi-1.9.8'';
+    sha256  = ''0ph098bv92rn5wl6rn2hwb4ng24v4187sz8pa0bpi9jfh50im879'';
+    gemPath = [];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''ffi'' hotfix) hotfix.ffi);
+  w3c_validators = buildRubyGem ({
+    name    = ''w3c_validators-1.2'';
+    sha256  = ''0kz0y6ki2q0xplxhk1aamp8x2pmgkvkfwhz7g481dg44gqlw5pbb'';
+    gemPath = [json nokogiri ];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''w3c_validators'' hotfix) hotfix.w3c_validators);
+  json = buildRubyGem ({
+    name    = ''json-1.8.2'';
+    sha256  = ''0zzvv25vjikavd3b1bp6lvbgj23vv9jvmnl4vpim8pv30z8p6vr5'';
+    gemPath = [];
+    ruby    = ruby_2_2;
+  } // optionalAttrs (hasAttr ''json'' hotfix) hotfix.json);
+in pkgs.stdenv.mkDerivation {
+  name = "muflax.com";
+  src = ../.;
+  LC_ALL="en_US.utf8";
+  buildInputs =
+    [awesome_print builder erubis image_size kramdown nanoc nokogiri org-ruby pygments.rb sanitize sass tidy_ffi w3c_validators ] ++
+    [perlPackages.ImageExifTool pythonPackages.pygments glibcLocales];
+  patchPhase = ''
+    sed -i 's/do$/do |_, _|/' commands/backup/*
+  '';
+  buildPhase = ''
+    nanoc references
+    nanoc images
+    for site in blog daily gospel muflax; do
+      nanoc compile -s $site
+      nanoc compress -s $site
+    done
+  '';
+  installPhase = ''
+    mv out $out
+  '';
+}
diff --git a/maintenance/generate.sh b/maintenance/generate.sh
new file mode 100755
index 0000000..59ac413
--- /dev/null
+++ b/maintenance/generate.sh
@@ -0,0 +1,148 @@
+#!/usr/bin/env bash
+
+IsRubyGem() {
+  test 200 = "$(curl -sL -w '%{http_code}' https://rubygems.org/api/v1/gems/$1.json -o /dev/null)";
+};
+
+Map() {
+  while read Line; do $* $Line; done
+};
+
+Filter() {
+  X() { $* && (shift; echo $*;) }; Map X $*
+};
+
+TopLevelDependencies() {
+  ( # Nanoc isn't an explicit dependency:
+    echo nanoc;
+    # We want its filters too; and those aren't referenced in the gemspec.
+    # But we really don't need all of them. (There are a lot.)
+    # For now they're being incorporated on an ad-hoc basis:
+    tr ' ' '\n' <<< "sass kramdown erubis pygments.rb w3c_validators builder";
+    # Local requires, hopefully there aren't any gems named differently from their imports.
+    grep -Proh "(?<=require ['\"])[^/'\"]+" ..;
+  ) | sort -u | Filter IsRubyGem
+};
+
+GetLatestVersion() {
+  curl -sL https://rubygems.org/api/v1/gems/$1.json | jq -r '.version'
+};
+
+read -r -d '' AWKPrelude <<EOF
+ @include "join";
+ function unescape(str) {
+   gsub("&gt;",">",str);
+   gsub("&lt;","<",str);
+   gsub(/^= /,"== ",str);
+   return str;
+ }
+ function ver(str) {
+   n=split(str,xs,".");
+   v=xs[1]; for(i=2;i<=n;i++)
+     v+=xs[i]*(10**(1-i));
+   return v
+ }
+ function unwakka(str) {
+   if (str ~ /^~>/) {
+     sub(/^[^ ]+ */,"",str);
+     n=split(str,xs,".");xs[n-1]++;xs[n]=0;
+     return(sprintf(">= %s, < %s", str, join(xs,1,n,".")));
+   } else return str
+ };
+EOF
+
+CompileConstraint() {
+  awk "$AWKPrelude"'
+    NF {
+      printf "%s;", $1;
+      sub(".*" $1 FS, "");
+      sub($0, unwakka(unescape($0)));
+      split($0, xs, ", "); for (x in xs)
+        split(xs[x],ys," ");
+        printf "ver($0) %s %s && ", ys[1], ver(ys[2])
+      print "1"
+    }
+  ';
+};
+
+SatisfyConstraint() {
+  GemName="$1"; Constraint="$2";
+  curl -s https://rubygems.org/api/v1/versions/$GemName.json \
+    | jq -r '.[] | .number' \
+    | awk "$AWKPrelude ($Constraint){print;exit}"
+};
+
+GetDependencies() {
+  # The RubyGems API doesn't seem to permit retrieving the dependencies of any
+  # version other than the most recent, so we resort to scraping.
+  GemName="$1"; GemVersion="$2";
+  curl -s https://rubygems.org/gems/$GemName/versions/$GemVersion  \
+    | xmllint --xpath '//div[@id="runtime_dependencies"]/div/a//text()' --html 2>/dev/null - \
+    | CompileConstraint \
+    | { IFS=";"; while read -r Name Constraint; do
+        Version="$(SatisfyConstraint "$Name" "$Constraint")"
+        test -n "$Name" && test -n "$Version" && echo "$Name" "$Version"
+      done; }
+};
+
+GetSHA256() {
+  nix-prefetch-url https://rubygems.org/downloads/$1.gem 2>/dev/null
+};
+
+GemCache="$(mktemp ${TMPDIR:-/tmp}/GEMS.XXXXXXX)";
+
+Gem2Nix() {
+  GemName=$1; GemVersion="${2:-$(GetLatestVersion $GemName)}";
+  grep -qE "^$GemName" "$GemCache" || {
+    echo $GemName >> "$GemCache";
+    sed 's/^    //;/^$/d' <<< "
+      $GemName = buildRubyGem ({
+        name    = ''$GemName-$GemVersion'';
+        sha256  = ''$(GetSHA256 $GemName-$GemVersion)'';
+        gemPath = [$(GetDependencies "$GemName" "$GemVersion" | cut -d' ' -f1 | tr '\n' ' ')];
+        ruby    = ruby_2_2;
+      } // optionalAttrs (hasAttr ''$GemName'' hotfix) hotfix.$GemName);
+    "; GetDependencies "$GemName" "$GemVersion" | Map Gem2Nix
+  };
+};
+
+cat <<EOF
+{ pkgs ? import <nixpkgs> {}
+}: let
+  inherit (pkgs) 
+    callPackage buildRubyGem lib ruby_2_2 libtidy
+    perlPackages pythonPackages glibcLocales;
+  inherit (lib) optionalAttrs hasAttr mapAttrs;
+  hotfix = mapAttrs (_: f: f {}) (callPackage <nixpkgs/pkgs/development/interpreters/ruby/bundler-env/default-gem-config.nix> {}) // {
+    tidy_ffi = {
+      postInstall = ''
+        substituteInPlace \$out/lib/ruby/gems/2.2.0/gems/tidy_ffi-0.1.6/lib/tidy_ffi/lib_tidy.rb --replace 'usr' \${libtidy}
+      '';
+    };
+  };
+EOF
+TopLevelDependencies | Map Gem2Nix
+cat <<EOF
+in pkgs.stdenv.mkDerivation {
+  name = "muflax.com";
+  src = ../.;
+  LC_ALL="en_US.utf8";
+  buildInputs =
+    [$(TopLevelDependencies | tr '\n' ' ')] ++
+    [perlPackages.ImageExifTool pythonPackages.pygments glibcLocales];
+  patchPhase = ''
+    sed -i 's/do$/do |_, _|/' commands/backup/*
+  '';
+  buildPhase = ''
+    nanoc references
+    nanoc images
+    for site in blog daily gospel muflax; do
+      nanoc compile -s \$site
+      nanoc compress -s \$site
+    done
+  '';
+  installPhase = ''
+    mv out \$out
+  '';
+}
+EOF