diff --git a/pkgs/development/compilers/crystal/default.nix b/pkgs/development/compilers/crystal/default.nix
index 9491a545a784b..db22b668cf5ef 100644
--- a/pkgs/development/compilers/crystal/default.nix
+++ b/pkgs/development/compilers/crystal/default.nix
@@ -178,33 +178,6 @@ let
   }));
 
 in rec {
-  binaryCrystal_0_27 = genericBinary {
-    version = "0.27.2";
-    sha256s = {
-      x86_64-linux  = "05l5x7kx2acgnv42fj3rr17z73ix06zvi05h7d7vf3kw0izxrasm";
-      i686-linux    = "1iwizkvn6pglc0azkyfhlmk9ap793krdgcnbihd1kvrvs4cz0mm9";
-      x86_64-darwin = "14c69ac2dmfwmb5q56ps3xyxxb0mrbc91ahk9h07c8fiqfii3k9g";
-    };
-  };
-
-  binaryCrystal_0_29 = genericBinary {
-    version = "0.29.0";
-    sha256s = {
-      x86_64-linux  = "1wrk29sfx35akg7hxwpdiikvl18wd40gq1kwirw7x522hnq7vlna";
-      i686-linux    = "1nx0piis2k3nn7kqiijqazzbvlaavhgvsln0l3dxmpfa4i4dz5h2";
-      x86_64-darwin = "1fd0fbyf05abivnp3igjlrm2axf65n2wdmg4aq6nqj60ipc01rvd";
-    };
-  };
-
-  binaryCrystal_0_30 = genericBinary {
-    version = "0.30.1";
-    sha256s = {
-      x86_64-linux  = "1k2mb74jh3ns3m7y73j4wpf571sayn73zbn6d7q81d09r280zrma";
-      i686-linux    = "0vsq1ayf922spydp2g2mmimc797jmm7nl5nljhfppcclrwygdyk2";
-      x86_64-darwin = "1p3s4lwdgykb7h7aysjhrs7vm0zhinzw5d7rfv6jsyin4j8yxhzz";
-    };
-  };
-
   binaryCrystal_0_31 = genericBinary {
     version = "0.31.1";
     sha256s = {
@@ -214,32 +187,11 @@ in rec {
     };
   };
 
-  crystal_0_27 = generic {
-    version = "0.27.2";
-    sha256  = "0vxqnpqi85yh0167nrkbksxsni476iwbh6y3znbvbjbbfhsi3nsj";
-    doCheck = false; # about 20 tests out of more than 15000 are failing
-    binary = binaryCrystal_0_27;
-  };
-
-  crystal_0_29 = generic {
-    version = "0.29.0";
-    sha256  = "0v9l253b2x8yw6a43vvalywpwciwr094l3g5wakmndfrzak2s3zr";
-    doCheck = false; # 6 checks are failing now
-    binary = binaryCrystal_0_29;
-  };
-
-  crystal_0_30 = generic {
-    version = "0.30.1";
-    sha256  = "0fbk784zjflsl3hys5a1xmn8mda8kb2z7ql58wpyfavivswxanbs";
-    doCheck = false; # 6 checks are failing now
-    binary = binaryCrystal_0_29;
-  };
-
   crystal_0_31 = generic {
     version = "0.31.1";
     sha256  = "1dswxa32w16gnc6yjym12xj7ibg0g6zk3ngvl76lwdjqb1h6lwz8";
     doCheck = false; # 5 checks are failing now
-    binary = binaryCrystal_0_30;
+    binary = binaryCrystal_0_31;
   };
 
   crystal_0_32 = generic {
@@ -248,7 +200,21 @@ in rec {
     binary = binaryCrystal_0_31;
   };
 
-  crystal = crystal_0_32;
+  crystal_0_33 = generic {
+    version = "0.33.0";
+    sha256  = "1zg0qixcws81s083wrh54hp83ng2pa8iyyafaha55mzrh8293jbi";
+    binary = binaryCrystal_0_31;
+    doCheck = false; # 4 checks are failing now
+  };
+
+  crystal_0_34 = generic {
+    version = "0.34.0";
+    sha256  = "110lfpxk9jnqyznbfnilys65ixj5sdmy8pvvnlhqhc3ccvrlnmq4";
+    binary = crystal_0_33;
+    doCheck = false; # 4 checks are failing now
+  };
+
+  crystal = crystal_0_34;
 
   crystal2nix = callPackage ./crystal2nix.nix {};
 }
diff --git a/pkgs/development/tools/build-managers/shards/default.nix b/pkgs/development/tools/build-managers/shards/default.nix
index 7f0cc8100ac04..4ad78778a9161 100644
--- a/pkgs/development/tools/build-managers/shards/default.nix
+++ b/pkgs/development/tools/build-managers/shards/default.nix
@@ -1,27 +1,18 @@
 { stdenv, fetchFromGitHub, crystal, pcre, libyaml, which }:
 
-stdenv.mkDerivation rec {
+crystal.buildCrystalPackage rec {
   pname = "shards";
-  version = "0.9.0";
+  version = "0.10.0";
 
   src = fetchFromGitHub {
     owner  = "crystal-lang";
     repo   = "shards";
     rev    = "v${version}";
-    sha256 = "19q0xww4v0h5ln9gz8d8zv0c9ig761ik7gw8y31yxynzgzihwpf4";
+    sha256 = "1bjy3hcdqq8769bx73f3pwn26rnkj23dngyfbw4iv32bw23x1d49";
   };
 
-  buildInputs = [ crystal libyaml pcre which ];
-
-  buildFlags = [ "CRFLAGS=--release" ];
-
-  installPhase = ''
-    runHook preInstall
-
-    install -Dm755 bin/shards $out/bin/shards
-
-    runHook postInstall
-  '';
+  shardsFile = ./shards.nix;
+  crystalBinaries.shards.src = "./src/shards.cr";
 
   meta = with stdenv.lib; {
     description = "Dependency manager for the Crystal language";
diff --git a/pkgs/development/tools/build-managers/shards/shards.nix b/pkgs/development/tools/build-managers/shards/shards.nix
new file mode 100644
index 0000000000000..901b7f6e47d17
--- /dev/null
+++ b/pkgs/development/tools/build-managers/shards/shards.nix
@@ -0,0 +1,8 @@
+{
+  molinillo = {
+    owner = "crystal-lang";
+    repo = "crystal-molinillo";
+    rev = "v0.1.0";
+    sha256 = "0rs0w59m6ccsgkdxfy3xv6alxsziy9sy9smz71cz0dnyvlzlnaxj";
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 4788e1c2f5bad..9a9f0841aa67f 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -8077,14 +8077,13 @@ in
   cryptol = haskell.lib.justStaticExecutables haskellPackages.cryptol;
 
   inherit (callPackages ../development/compilers/crystal {
-    stdenv = if stdenv.cc.isClang then llvmPackages_6.stdenv else stdenv;
-    inherit (llvmPackages_6) clang llvm;
+    stdenv = if stdenv.cc.isClang then llvmPackages.stdenv else stdenv;
+    inherit (llvmPackages) clang llvm;
   })
-    crystal_0_27
-    crystal_0_29
-    crystal_0_30
     crystal_0_31
     crystal_0_32
+    crystal_0_33
+    crystal_0_34
     crystal
     crystal2nix;