diff --git a/Cargo.lock b/Cargo.lock
index 4c8f6159b..f0cbad458 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -303,6 +303,7 @@ dependencies = [
  "hyper 0.11.25 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "md5 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pulldown-cmark 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "r2d2 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "reqwest 0.8.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -658,6 +659,11 @@ name = "gcc"
 version = "0.3.54"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "getopts"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "glob"
 version = "0.2.11"
@@ -1163,6 +1169,7 @@ version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getopts 0.2.17 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2153,6 +2160,7 @@ dependencies = [
 "checksum futures 0.1.21 (registry+https://github.com/rust-lang/crates.io-index)" = "1a70b146671de62ec8c8ed572219ca5d594d9b06c0b364d5e67b722fc559b48c"
 "checksum futures-cpupool 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "ab90cde24b3319636588d0c35fe03b1333857621051837ed769faefb4c2162e4"
 "checksum gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)" = "5e33ec290da0d127825013597dbdfc28bee4964690c7ce1166cbc2a7bd08b1bb"
+"checksum getopts 0.2.17 (registry+https://github.com/rust-lang/crates.io-index)" = "b900c08c1939860ce8b54dc6a89e26e00c04c380fd0e09796799bd7f12861e05"
 "checksum glob 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "8be18de09a56b60ed0edf84bc9df007e30040691af7acd1c41874faac5895bfb"
 "checksum h2 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "065fb096fc65bbfb9c765d48c9f3f1a21cdb25ba0d3f82105b38f30ddffa2f7e"
 "checksum hostname 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "58fab6e177434b0bb4cd344a4dabaa5bd6d7a8d792b1885aebcae7af1091d1cb"
diff --git a/Cargo.toml b/Cargo.toml
index e46808e5f..de71231ca 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,3 +27,6 @@ comrak = "0.2"
 md5 = "0.3.7"
 tokio = "0.1"
 tokio-timer = "0.2"
+
+[build-dependencies]
+pulldown-cmark = "0.1"
diff --git a/default.nix b/default.nix
index 33794d1d5..903ddb523 100644
--- a/default.nix
+++ b/default.nix
@@ -1,6 +1,7 @@
-# Generated by carnix 0.6.7: carnix --standalone -o carnix.nix Cargo.lock
-with import <nixpkgs> {};
-let kernel = buildPlatform.parsed.kernel.name;
+# Generated by carnix 0.6.7: carnix --standalone -o default.nix Cargo.lock
+{ pkgs ? import <nixpkgs> {} }:
+
+with pkgs; let kernel = buildPlatform.parsed.kernel.name;
     abi = buildPlatform.parsed.abi.name;
     include = includedFiles: src:
       # The comments assume the `include` field of the Cargo.toml like:
@@ -559,6 +560,13 @@ rec {
     sha256 = "07a5i47r8achc6gxsba3ga17h9gnh4b9a2cak8vjg4hx62aajkr4";
     inherit dependencies buildDependencies features;
   };
+  getopts_0_2_17_ = { dependencies?[], buildDependencies?[], features?[] }: buildRustCrate {
+    crateName = "getopts";
+    version = "0.2.17";
+    authors = [ "The Rust Project Developers" ];
+    sha256 = "1rifkxn7njr2w1dsa29hrm26ywgcg8gv1ms00g3vs5mjiabxk0jv";
+    inherit dependencies buildDependencies features;
+  };
   glob_0_2_11_ = { dependencies?[], buildDependencies?[], features?[] }: buildRustCrate {
     crateName = "glob";
     version = "0.2.11";
@@ -2342,6 +2350,7 @@ rec {
   }) [ clap_2_31_2_features entities_1_0_1_features lazy_static_1_0_0_features pest_1_0_6_features pest_derive_1_0_7_features regex_0_2_10_features twoway_0_1_8_features typed_arena_1_3_0_features unicode_categories_0_1_1_features ];
   converse_0_1_0 = { features?(converse_0_1_0_features {}) }: converse_0_1_0_ {
     dependencies = mapFeatures features ([ actix_0_5_6 actix_web_0_5_4 chrono_0_4_2 comrak_0_2_9 diesel_1_2_2 env_logger_0_5_9 failure_0_1_1 futures_0_1_21 hyper_0_11_25 log_0_4_1 md5_0_3_7 r2d2_0_8_2 rand_0_4_2 reqwest_0_8_5 serde_1_0_43 serde_derive_1_0_43 serde_json_1_0_16 tera_0_11_6 tokio_0_1_5 tokio_timer_0_2_1 url_1_7_0 url_serde_0_2_0 ]);
+    buildDependencies = mapFeatures features ([ pulldown_cmark_0_1_2 ]);
   };
   converse_0_1_0_features = f: updateFeatures f (rec {
     actix_0_5_6.default = true;
@@ -2360,6 +2369,7 @@ rec {
     hyper_0_11_25.default = true;
     log_0_4_1.default = true;
     md5_0_3_7.default = true;
+    pulldown_cmark_0_1_2.default = true;
     r2d2_0_8_2.default = true;
     rand_0_4_2.default = true;
     reqwest_0_8_5.default = true;
@@ -2371,7 +2381,7 @@ rec {
     tokio_timer_0_2_1.default = true;
     url_1_7_0.default = true;
     url_serde_0_2_0.default = true;
-  }) [ actix_0_5_6_features actix_web_0_5_4_features chrono_0_4_2_features comrak_0_2_9_features diesel_1_2_2_features env_logger_0_5_9_features failure_0_1_1_features futures_0_1_21_features hyper_0_11_25_features log_0_4_1_features md5_0_3_7_features r2d2_0_8_2_features rand_0_4_2_features reqwest_0_8_5_features serde_1_0_43_features serde_derive_1_0_43_features serde_json_1_0_16_features tera_0_11_6_features tokio_0_1_5_features tokio_timer_0_2_1_features url_1_7_0_features url_serde_0_2_0_features ];
+  }) [ actix_0_5_6_features actix_web_0_5_4_features chrono_0_4_2_features comrak_0_2_9_features diesel_1_2_2_features env_logger_0_5_9_features failure_0_1_1_features futures_0_1_21_features hyper_0_11_25_features log_0_4_1_features md5_0_3_7_features r2d2_0_8_2_features rand_0_4_2_features reqwest_0_8_5_features serde_1_0_43_features serde_derive_1_0_43_features serde_json_1_0_16_features tera_0_11_6_features tokio_0_1_5_features tokio_timer_0_2_1_features url_1_7_0_features url_serde_0_2_0_features pulldown_cmark_0_1_2_features ];
   cookie_0_10_1 = { features?(cookie_0_10_1_features {}) }: cookie_0_10_1_ {
     dependencies = mapFeatures features ([ time_0_1_39 ]
       ++ (if features.cookie_0_10_1.base64 or false then [ base64_0_6_0 ] else [])
@@ -3004,6 +3014,10 @@ rec {
       (f.gcc_0_3_54.parallel or false) ||
       (gcc_0_3_54.parallel or false);
   }) [];
+  getopts_0_2_17 = { features?(getopts_0_2_17_features {}) }: getopts_0_2_17_ {};
+  getopts_0_2_17_features = f: updateFeatures f (rec {
+    getopts_0_2_17.default = (f.getopts_0_2_17.default or true);
+  }) [];
   glob_0_2_11 = { features?(glob_0_2_11_features {}) }: glob_0_2_11_ {};
   glob_0_2_11_features = f: updateFeatures f (rec {
     glob_0_2_11.default = (f.glob_0_2_11.default or true);
@@ -3764,17 +3778,19 @@ rec {
     unicode_xid_0_1_0.default = true;
   }) [ unicode_xid_0_1_0_features ];
   pulldown_cmark_0_1_2 = { features?(pulldown_cmark_0_1_2_features {}) }: pulldown_cmark_0_1_2_ {
-    dependencies = mapFeatures features ([ bitflags_0_9_1 ]);
+    dependencies = mapFeatures features ([ bitflags_0_9_1 ]
+      ++ (if features.pulldown_cmark_0_1_2.getopts or false then [ getopts_0_2_17 ] else []));
     features = mkFeatures (features.pulldown_cmark_0_1_2 or {});
   };
   pulldown_cmark_0_1_2_features = f: updateFeatures f (rec {
     bitflags_0_9_1.default = true;
+    getopts_0_2_17.default = true;
     pulldown_cmark_0_1_2.default = (f.pulldown_cmark_0_1_2.default or true);
     pulldown_cmark_0_1_2.getopts =
       (f.pulldown_cmark_0_1_2.getopts or false) ||
       (f.pulldown_cmark_0_1_2.default or false) ||
       (pulldown_cmark_0_1_2.default or false);
-  }) [ bitflags_0_9_1_features ];
+  }) [ bitflags_0_9_1_features getopts_0_2_17_features ];
   quick_error_1_2_1 = { features?(quick_error_1_2_1_features {}) }: quick_error_1_2_1_ {};
   quick_error_1_2_1_features = f: updateFeatures f (rec {
     quick_error_1_2_1.default = (f.quick_error_1_2_1.default or true);
@@ -5156,4 +5172,4 @@ rec {
     winapi_build_0_1_1.default = true;
     ws2_32_sys_0_2_1.default = (f.ws2_32_sys_0_2_1.default or true);
   }) [ winapi_0_2_8_features winapi_build_0_1_1_features ];
-}.converse_0_1_0 {}
+}