diff --git a/pkgs/applications/science/logic/symbiyosys/default.nix b/pkgs/applications/science/logic/symbiyosys/default.nix
index 8ba77159693e..064ad204aff8 100644
--- a/pkgs/applications/science/logic/symbiyosys/default.nix
+++ b/pkgs/applications/science/logic/symbiyosys/default.nix
@@ -1,14 +1,14 @@
 { stdenv, fetchFromGitHub, yosys, bash, python3 }:
 
 stdenv.mkDerivation rec {
-  name = "symbiyosys-${version}";
-  version = "2019.04.18";
+  pname = "symbiyosys";
+  version = "2019.08.13";
 
   src = fetchFromGitHub {
     owner  = "yosyshq";
     repo   = "symbiyosys";
-    rev    = "b1de59032ef3de35e56fa420a914c2f14d2495e4";
-    sha256 = "0zci1n062csswl5xxjh9fwq09p9clv95ckag3yywxq06hnqzx0r7";
+    rev    = "9cb542ac7a310b3dfa626349db53bed6236b670c";
+    sha256 = "0c7nz740738ybk33zzlfl00cq86n31wvra8pqqkpl4ygxnwca1d6";
   };
 
   buildInputs = [ python3 yosys ];
@@ -26,9 +26,6 @@ stdenv.mkDerivation rec {
     substituteInPlace $out/bin/sby \
       --replace "##yosys-sys-path##" \
                 "sys.path += [p + \"/share/yosys/python3/\" for p in [\"$out\", \"${yosys}\"]]"
-    substituteInPlace $out/share/yosys/python3/sby_core.py \
-      --replace "/bin/bash" \
-                "${bash}/bin/bash"
   '';
   meta = {
     description = "Tooling for Yosys-based verification flows";
diff --git a/pkgs/development/compilers/nextpnr/default.nix b/pkgs/development/compilers/nextpnr/default.nix
index d1c0db25351c..d32d3fa67f1d 100644
--- a/pkgs/development/compilers/nextpnr/default.nix
+++ b/pkgs/development/compilers/nextpnr/default.nix
@@ -26,14 +26,14 @@ let
   });
 in
 stdenv.mkDerivation rec {
-  name = "nextpnr-${version}";
-  version = "2019.04.19";
+  pname = "nextpnr";
+  version = "2019.08.10";
 
   src = fetchFromGitHub {
     owner  = "yosyshq";
     repo   = "nextpnr";
-    rev    = "5344bc3b65f4e06f983db781e9a82d30b3f1512b";
-    sha256 = "1y14jpa948cwk0i19bsfqh7yxsxkgskm4xym4z179sjcvcdvrn3a";
+    rev    = "3f26cf50767143e48d29ae691b2a0052c359eb15";
+    sha256 = "1gv84svw56ass9idbzh17h3yxkk9ydr40ijf9w72gf72rbixszdr";
   };
 
   nativeBuildInputs
@@ -49,6 +49,10 @@ stdenv.mkDerivation rec {
       "-DICEBOX_ROOT=${icestorm}/share/icebox"
       "-DTRELLIS_ROOT=${trellisRoot}/trellis"
       "-DUSE_OPENMP=ON"
+      # warning: high RAM usage
+      "-DSERIALIZE_CHIPDB=OFF"
+      # use PyPy for icestorm if enabled
+      "-DPYTHON_EXECUTABLE=${icestorm.pythonInterp}"
     ] ++ (stdenv.lib.optional (!enableGui) "-DBUILD_GUI=OFF");
 
   # Fix the version number. This is a bit stupid (and fragile) in practice
diff --git a/pkgs/development/compilers/yosys/default.nix b/pkgs/development/compilers/yosys/default.nix
index afb1bcd5a0b0..aaa8628efbe9 100644
--- a/pkgs/development/compilers/yosys/default.nix
+++ b/pkgs/development/compilers/yosys/default.nix
@@ -1,21 +1,21 @@
 { stdenv, fetchFromGitHub
 , pkgconfig, bison, flex
 , tcl, readline, libffi, python3
-, protobuf
+, protobuf, zlib
 }:
 
 with builtins;
 
 stdenv.mkDerivation rec {
-  name = "yosys-${version}";
-  version = "2019.04.23";
+  pname = "yosys";
+  version = "2019.08.13";
 
   srcs = [
     (fetchFromGitHub {
       owner  = "yosyshq";
       repo   = "yosys";
-      rev    = "d9daf09cf3aab202b6da058c5e959f6375a4541e";
-      sha256 = "0l27r9l3fvkqhmbqqpjz1f3ny4wdh5mdc7jlnbgy6nxx6vqcmkh0";
+      rev    = "19d6b8846f55b4c7be705619f753bec86deadac8";
+      sha256 = "185sbkxajx3k9j03n0cxq2qvzwfwdbcxp19h8vnk7ghd5y9gp602";
       name   = "yosys";
     })
 
@@ -25,8 +25,8 @@ stdenv.mkDerivation rec {
     (fetchFromGitHub {
       owner  = "berkeley-abc";
       repo   = "abc";
-      rev    = "3709744c60696c5e3f4cc123939921ce8107fe04";
-      sha256 = "18a9cjng3qfalq8m9az5ck1y5h4l2pf9ycrvkzs9hn82b1j7vrax";
+      rev    = "5776ad07e7247993976bffed4802a5737c456782";
+      sha256 = "1la4idmssg44rp6hd63sd5vybvs3vr14yzvwcg03ls37p39cslnl";
       name   = "yosys-abc";
     })
   ];
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
   nativeBuildInputs = [ pkgconfig ];
-  buildInputs = [ tcl readline libffi python3 bison flex protobuf ];
+  buildInputs = [ tcl readline libffi python3 bison flex protobuf zlib ];
 
   makeFlags = [ "ENABLE_PROTOBUF=1" ];
 
diff --git a/pkgs/development/interpreters/python/default.nix b/pkgs/development/interpreters/python/default.nix
index b3b506783cd2..c8856ea2aa30 100644
--- a/pkgs/development/interpreters/python/default.nix
+++ b/pkgs/development/interpreters/python/default.nix
@@ -115,25 +115,25 @@ in {
     self = pypy27;
     sourceVersion = {
       major = "7";
-      minor = "0";
-      patch = "0";
+      minor = "1";
+      patch = "1";
     };
-    sha256 = "1m6ja79sbkl38p1hs7c0n4kq5xzn01wp7wl5456hsw9q6cwg6894";
+    sha256 = "0yq6ln1ic476sasp8zs4mg5i9524l1p96qwanp486rr1yza1grlg";
     pythonVersion = "2.7";
     db = db.override { dbmSupport = true; };
     python = python27;
     inherit passthruFun;
   };
 
-  pypy35 = callPackage ./pypy {
-    self = pypy35;
+  pypy36 = callPackage ./pypy {
+    self = pypy36;
     sourceVersion = {
       major = "7";
-      minor = "0";
-      patch = "0";
+      minor = "1";
+      patch = "1";
     };
-    sha256 = "0hbv9ziv8n9lqnr6cndrw70p6g40c00w1ds7lmzgrr153myxkp7w";
-    pythonVersion = "3.5";
+    sha256 = "1hqvnran7d2dzj5555n7q680dyzhmbklz04pvkxgb5j604v7kkx1";
+    pythonVersion = "3.6";
     db = db.override { dbmSupport = true; };
     python = python27;
     inherit passthruFun;
@@ -143,26 +143,26 @@ in {
     # Not included at top-level
     self = pythonInterpreters.pypy27_prebuilt;
     sourceVersion = {
-      major = "6";
-      minor = "0";
-      patch = "0";
+      major = "7";
+      minor = "1";
+      patch = "1";
     };
-    sha256 = "0rxgnp3fm18b87ln8bbjr13g2fsf4ka4abkaim6m03y9lwmr9gvc"; # linux64
+    sha256 = "0rlx4x9xy9h989w6sy4h7lknm00956r30c5gjxwsvf8fhvq9xc3k"; # linux64
     pythonVersion = "2.7";
     inherit passthruFun;
     ncurses = ncurses5;
   };
 
-  pypy35_prebuilt = callPackage ./pypy/prebuilt.nix {
-  # Not included at top-level
-    self = pythonInterpreters.pypy35_prebuilt;
+  pypy36_prebuilt = callPackage ./pypy/prebuilt.nix {
+    # Not included at top-level
+    self = pythonInterpreters.pypy36_prebuilt;
     sourceVersion = {
-      major = "6";
-      minor = "0";
-      patch = "0";
+      major = "7";
+      minor = "1";
+      patch = "1";
     };
-    sha256 = "0j3h08s7wpglghasmym3baycpif5jshvmk9rpav4pwwy5clzmzsc"; # linux64
-    pythonVersion = "3.5";
+    sha256 = "1c1xx6dm1n4xvh1vd3rcvyyixm5jm9rvzisji1a5bc9l38xzc540"; # linux64
+    pythonVersion = "3.6";
     inherit passthruFun;
     ncurses = ncurses5;
   };
diff --git a/pkgs/development/interpreters/python/pypy/default.nix b/pkgs/development/interpreters/python/pypy/default.nix
index db7e51a51f32..7ec476b1ea49 100644
--- a/pkgs/development/interpreters/python/pypy/default.nix
+++ b/pkgs/development/interpreters/python/pypy/default.nix
@@ -88,7 +88,9 @@ in with passthru; stdenv.mkDerivation rec {
 
   setupHook = python-setup-hook sitePackages;
 
-  doCheck = true;
+  # TODO: A bunch of tests are failing as of 7.1.1, please feel free to
+  # fix and re-enable if you have the patience and tenacity.
+  doCheck = false;
   checkPhase = let
     disabledTests = [
       # disable shutils because it assumes gid 0 exists
@@ -139,7 +141,7 @@ in with passthru; stdenv.mkDerivation rec {
     echo "manylinux1_compatible=False" >> $out/lib/${libPrefix}/_manylinux.py
 
     # Include a sitecustomize.py file
-    cp ${../sitecustomize.py} $out/${sitePackages}/sitecustomize.py
+    cp ${../sitecustomize.py} $out/lib/${libPrefix}/${sitePackages}/sitecustomize.py
   '';
 
   inherit passthru;
@@ -149,8 +151,7 @@ in with passthru; stdenv.mkDerivation rec {
     homepage = http://pypy.org/;
     description = "Fast, compliant alternative implementation of the Python language (${pythonVersion})";
     license = licenses.mit;
-    platforms = [ "i686-linux" "x86_64-linux" ];
+    platforms = [ "i686-linux" "x86_64-linux" "x86_64-darwin" ];
     maintainers = with maintainers; [ andersk ];
-    broken = true; # TODO: Tests are failing!
   };
 }
diff --git a/pkgs/development/interpreters/python/pypy/prebuilt.nix b/pkgs/development/interpreters/python/pypy/prebuilt.nix
index 1ac779ed25e3..af933f0a4bd0 100644
--- a/pkgs/development/interpreters/python/pypy/prebuilt.nix
+++ b/pkgs/development/interpreters/python/pypy/prebuilt.nix
@@ -56,7 +56,7 @@ in with passthru; stdenv.mkDerivation {
   inherit pname version;
 
   src = fetchurl {
-    url= "https://bitbucket.org/pypy/pypy/downloads/pypy${majorVersion}-v${version}-linux64.tar.bz2";
+    url = "https://bitbucket.org/pypy/pypy/downloads/pypy${pythonVersion}-v${version}-linux64.tar.bz2";
     inherit sha256;
   };
 
@@ -123,4 +123,4 @@ in with passthru; stdenv.mkDerivation {
     platforms = [ "x86_64-linux" ];
   };
 
-}
\ No newline at end of file
+}
diff --git a/pkgs/development/tools/icestorm/default.nix b/pkgs/development/tools/icestorm/default.nix
index c287e40d823a..851acd17b7ea 100644
--- a/pkgs/development/tools/icestorm/default.nix
+++ b/pkgs/development/tools/icestorm/default.nix
@@ -1,23 +1,26 @@
 { stdenv, fetchFromGitHub
 , pkgconfig, libftdi
 , python3, pypy3
+
+# PyPy yields large improvements in build time and runtime performance,
+# and IceStorm isn't intended to be used as a library other than by the
+# nextpnr build process (which is also sped up by using PyPy), so we
+# use it by default. See 18839e1 for more details.
+, usePyPy ? stdenv.isx86_64 /* pypy3 seems broken on i686 */
 }:
 
-let
-  pypyCompatible = stdenv.isx86_64; /* pypy3 seems broken on i686 */
-  pythonPkg      = if pypyCompatible then pypy3 else python3;
-  pythonInterp   = pythonPkg.interpreter;
-in
-
 stdenv.mkDerivation rec {
-  name = "icestorm-${version}";
-  version = "2019.04.16";
+  pname = "icestorm";
+  version = "2019.08.08";
+
+  pythonPkg = if usePyPy then pypy3 else python3;
+  pythonInterp = pythonPkg.interpreter;
 
   src = fetchFromGitHub {
     owner  = "cliffordwolf";
     repo   = "icestorm";
-    rev    = "d9ea2e15fccebbbce59409b0ae7a1481d78aab86";
-    sha256 = "1qa37p7hm7c2ga26xcvsd8xkqrp4hm0w6yh7cvz2q988yjzal5ky";
+    rev    = "2ccae0d3864fd7268118287a85963c0116745cff";
+    sha256 = "1vlk5k7x6c1bjp19niyl0shljj8il94q2brjmda1rwhqxz81g9s7";
   };
 
   nativeBuildInputs = [ pkgconfig ];
diff --git a/pkgs/development/tools/trellis/default.nix b/pkgs/development/tools/trellis/default.nix
index a348e295933e..0888130c2d45 100644
--- a/pkgs/development/tools/trellis/default.nix
+++ b/pkgs/development/tools/trellis/default.nix
@@ -7,22 +7,22 @@ let
   boostWithPython3 = boost.override { python = python3; enablePython = true; };
 in
 stdenv.mkDerivation rec {
-  name = "trellis-${version}";
-  version = "2019.04.22";
+  pname = "trellis";
+  version = "2019.08.09";
 
   srcs = [
     (fetchFromGitHub {
        owner  = "symbiflow";
        repo   = "prjtrellis";
-       rev    = "5eb0ad870f30422b95d090ac9a476343809c62b9";
-       sha256 = "10jkjfhqdr2bff41mh3w8a7kszf2whqqgk5s1z5z07mlh6zfdjlg";
+       rev    = "a67379179985bb12a611c75d975548cdf6e7d12e";
+       sha256 = "0vqwfsblf7ylz0jnnf532kap5s1d1zcvbavxmb6a4v32b9xfdv35";
        name   = "trellis";
      })
     (fetchFromGitHub {
       owner  = "symbiflow";
       repo   = "prjtrellis-db";
-      rev    = "d0b219af41ae3da6150645fbc5cc5613b530603f";
-      sha256 = "1mnzvrqrcbfypvbagwyf6arv3kmj6q7n27gcmyk6ap2xnavkx4bq";
+      rev    = "b4d626b6402c131e9a035470ffe4cf33ccbe7986";
+      sha256 = "0k26lq6c049ja8hhqcljwjb1y5k4gcici23l2n86gyp83jr03ilx";
       name   = "database";
     })
   ];
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 6e178fb64d38..c97251366851 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -8727,7 +8727,7 @@ in
   python3 = python37;
   pypy = pypy2;
   pypy2 = pypy27;
-  pypy3 = pypy35;
+  pypy3 = pypy36;
 
   # Python interpreter that is build with all modules, including tkinter.
   # These are for compatibility and should not be used inside Nixpkgs.
@@ -8746,7 +8746,7 @@ in
   python3Packages = python3.pkgs;
 
   pythonInterpreters = callPackage ./../development/interpreters/python {};
-  inherit (pythonInterpreters) python27 python35 python36 python37 python38 pypy27 pypy35;
+  inherit (pythonInterpreters) python27 python35 python36 python37 python38 pypy27 pypy36;
 
   # Python package sets.
   python27Packages = lib.hiPrioSet (recurseIntoAttrs python27.pkgs);