diff --git a/pkgs/data/misc/prjxray-db/default.nix b/pkgs/data/misc/prjxray-db/default.nix
deleted file mode 100644
index edc3c86438f6..000000000000
--- a/pkgs/data/misc/prjxray-db/default.nix
+++ /dev/null
@@ -1,43 +0,0 @@
-{ lib, stdenv
-, fetchFromGitHub
-}:
-
-stdenv.mkDerivation rec {
-  pname   = "prjxray-db";
-  version = "0.0-0232-g303a61d";
-
-  src = fetchFromGitHub {
-    owner  = "SymbiFlow";
-    repo   = "prjxray-db";
-    rev    = "303a61d8bc552f7a533b91b17448c59e908aa391";
-    sha256 = "0r75xig16dbgh3nfygggir0a160x52y766h7hd9xcib9m88jixb2";
-  };
-
-  enableParallelBuilding = true;
-
-  installPhase = ''
-    runHook preInstall
-
-    DBDIR="$out/share/symbiflow/prjxray-db/"
-    DB_CONFIG="$out/bin/prjxray-config"
-
-    mkdir -p $DBDIR $out/bin
-
-    for device in artix7 kintex7 zynq7; do
-      cp -r $src/$device $DBDIR
-    done
-
-    echo -e "#!/bin/sh\n\necho $DBDIR" > $DB_CONFIG
-    chmod +x $DB_CONFIG
-
-    runHook postInstall
-  '';
-
-  meta = with lib; {
-    description = "Project X-Ray - Xilinx Series 7 Bitstream Documentation";
-    homepage    = "https://github.com/SymbiFlow/prjxray-db";
-    license     = licenses.cc0;
-    maintainers = with maintainers; [ mcaju ];
-    platforms   = platforms.all;
-  };
-}
diff --git a/pkgs/data/misc/symbiflow-arch-defs/default.nix b/pkgs/data/misc/symbiflow-arch-defs/default.nix
deleted file mode 100644
index 3f6e39d85f90..000000000000
--- a/pkgs/data/misc/symbiflow-arch-defs/default.nix
+++ /dev/null
@@ -1,47 +0,0 @@
-{ lib, stdenv
-, fetchurl
-, autoPatchelfHook
-, python3Packages
-, archs ? [ "xc7a100t" "xc7a50t" "xc7z010" "xc7z020" ]
-}:
-
-stdenv.mkDerivation rec {
-  pname   = "symbiflow-arch-defs";
-  version = "20200914-111752-g05d68df0";
-
-  src = fetchurl {
-    url = "https://storage.googleapis.com/symbiflow-arch-defs/artifacts/prod/foss-fpga-tools/symbiflow-arch-defs/continuous/install/66/20200914-111752/symbiflow-arch-defs-install-05d68df0.tar.xz";
-    sha256 = "1gmynybh8n33ag521w17c2kd16n834hqc6d8hi2pfs5kg1jl1a74";
-  };
-
-  sourceRoot = ".";
-
-  propagatedBuildInputs = [
-    python3Packages.lxml
-    python3Packages.python-constraint
-  ];
-
-  installPhase = ''
-    mkdir -p $out/bin
-    cp -r bin/{symbiflow_*,vpr_common,python} $out/bin
-    for script in $out/bin/symbiflow_*; do
-        substituteInPlace $script --replace '/env' '/symbiflow_env'
-    done
-    cp bin/env $out/bin/symbiflow_env
-
-    mkdir -p $out/share/symbiflow/arch
-    cp -r share/symbiflow/{scripts,techmaps} $out/share/symbiflow/
-
-    for arch in ${builtins.concatStringsSep " " archs}; do
-        cp -r share/symbiflow/arch/"$arch"_test* $out/share/symbiflow/arch/
-    done
-  '';
-
-  meta = with lib; {
-    description = "Project X-Ray - Xilinx Series 7 Bitstream Documentation";
-    homepage    = "https://github.com/SymbiFlow/symbiflow-arch-defs";
-    hydraPlatforms = [];
-    license     = licenses.isc;
-    platforms   = platforms.all;
-  };
-}
diff --git a/pkgs/development/compilers/ghdl/default.nix b/pkgs/development/compilers/ghdl/default.nix
index 6d1fae337340..6181486f50c7 100644
--- a/pkgs/development/compilers/ghdl/default.nix
+++ b/pkgs/development/compilers/ghdl/default.nix
@@ -5,13 +5,15 @@ assert backend == "mcode" || backend == "llvm";
 
 stdenv.mkDerivation rec {
   pname = "ghdl-${backend}";
-  version = "0.37";
+  # NOTE(aseipp): move to 0.38 when it comes out, since it should support a stable
+  # version of the yosys plugin
+  version = "unstable-2021.01.14";
 
   src = fetchFromGitHub {
-    owner = "ghdl";
-    repo = "ghdl";
-    rev = "v${version}";
-    sha256 = "0b53yl4im33c1cd4mdyc4ks9cmrpixym17gzchfmplrl22w3l17y";
+    owner  = "ghdl";
+    repo   = "ghdl";
+    rev    = "4868294436574660552ccef50a5b0849559393de";
+    sha256 = "1wqjf0qc66dam1n2mskmlvj53bcsdwwk5rq9gimq6ah1vcwi222p";
   };
 
   LIBRARY_PATH = "${stdenv.cc.libc}/lib";
@@ -23,7 +25,7 @@ stdenv.mkDerivation rec {
     sed -i 's/check_version 7.0/check_version 7/g' configure
   '';
 
-  configureFlags = lib.optional (backend == "llvm")
+  configureFlags = [ "--enable-synth" ] ++ lib.optional (backend == "llvm")
     "--with-llvm-config=${llvm}/bin/llvm-config";
 
   hardeningDisable = [ "format" ];
@@ -33,7 +35,7 @@ stdenv.mkDerivation rec {
   meta = with lib; {
     homepage = "https://github.com/ghdl/ghdl";
     description = "VHDL 2008/93/87 simulator";
-    maintainers = with maintainers; [ lucus16 ];
+    maintainers = with maintainers; [ lucus16 thoughtpolice ];
     platforms = platforms.linux;
     license = licenses.gpl2;
   };
diff --git a/pkgs/development/compilers/prjxray-tools/default.nix b/pkgs/development/compilers/prjxray-tools/default.nix
deleted file mode 100644
index 652b5458a75e..000000000000
--- a/pkgs/development/compilers/prjxray-tools/default.nix
+++ /dev/null
@@ -1,29 +0,0 @@
-{ stdenv
-, fetchFromGitHub
-, cmake
-}:
-
-stdenv.mkDerivation rec {
-  pname   = "prjxray-tools";
-  version = "0.1-2676-gac8d30e3";
-
-  src = fetchFromGitHub {
-    owner  = "SymbiFlow";
-    repo   = "prjxray";
-    fetchSubmodules = true;
-    rev    = "ac8d30e3fe2029122408888d2313844b3e0c265b";
-    sha256 = "1ag7dk12hdhip821crwinncp8vgyzs0r85l1h2vbgn61lnxc7f4h";
-  };
-
-  nativeBuildInputs = [ cmake ];
-
-  doCheck = true;
-
-  meta = with stdenv.lib; {
-    description = "Documenting the Xilinx 7-series bit-stream format";
-    homepage    = "https://github.com/SymbiFlow/prjxray";
-    license     = licenses.isc;
-    platforms   = platforms.all;
-    maintainers = with maintainers; [ mcaju ];
-  };
-}
diff --git a/pkgs/development/compilers/symbiflow-vtr/default.nix b/pkgs/development/compilers/symbiflow-vtr/default.nix
deleted file mode 100644
index 8735b12678c3..000000000000
--- a/pkgs/development/compilers/symbiflow-vtr/default.nix
+++ /dev/null
@@ -1,40 +0,0 @@
-{ stdenv
-, fetchFromGitHub
-, bison
-, cmake
-, flex
-, pkg-config
-}:
-
-stdenv.mkDerivation rec {
-  pname   = "symbiflow-vtr";
-  version = "8.0.0.rc2-4003-g8980e4621";
-
-  src = fetchFromGitHub {
-    owner  = "SymbiFlow";
-    repo   = "vtr-verilog-to-routing";
-    rev    = "8980e46218542888fac879961b13aa7b0fba8432";
-    sha256 = "1sq7f1f3dzfm48a9vq5nvp0zllby0nasm3pvqab70f4jaq0m1aaa";
-  };
-
-  nativeBuildInputs = [
-    bison
-    cmake
-    flex
-    pkg-config
-  ];
-
-  cmakeFlags = [
-    "-DWITH_ODIN=OFF"
-    "-DWITH_ABC=OFF"
-  ];
-
-  doCheck = true;
-
-  meta = with stdenv.lib; {
-    description = "SymbiFlow WIP changes for Verilog to Routing (VTR)";
-    homepage    = "https://github.com/SymbiFlow/vtr-verilog-to-routing";
-    platforms   = platforms.all;
-    maintainers = with maintainers; [ mcaju ];
-  };
-}
diff --git a/pkgs/development/compilers/symbiflow-yosys-plugins/default.nix b/pkgs/development/compilers/symbiflow-yosys-plugins/default.nix
deleted file mode 100644
index b655f9d48733..000000000000
--- a/pkgs/development/compilers/symbiflow-yosys-plugins/default.nix
+++ /dev/null
@@ -1,37 +0,0 @@
-{ stdenv
-, fetchFromGitHub
-, symbiflow-yosys
-, zlib
-, readline
-}:
-
-stdenv.mkDerivation rec {
-  pname   = "symbiflow-yosys-plugins";
-  version = "1.0.0.7-0060-g7454cd6b";
-
-  src = fetchFromGitHub {
-    owner  = "SymbiFlow";
-    repo   = "yosys-symbiflow-plugins";
-    rev    = "7454cd6b5e4fd22854e2ada219a5e3c3a06e0717";
-    sha256 = "0r9r31p7fy4ylfrwvwlbivq5a03xrph34blxbxzx2c8bc02mbv0s";
-  };
-
-  enableParallelBuilding = true;
-
-  nativeBuildInputs = [ symbiflow-yosys ];
-
-  buildInputs = [
-    readline
-    zlib
-  ];
-
-  makeFlags = [ "PLUGINS_DIR=${placeholder "out"}/share/yosys/plugins" ];
-
-  meta = with stdenv.lib; {
-    description = "Yosys SymbiFlow Plugins";
-    homepage    = "https://github.com/SymbiFlow/yosys-symbiflow-plugins";
-    license     = licenses.isc;
-    platforms   = platforms.all;
-    maintainers = with maintainers; [ mcaju ];
-  };
-}
diff --git a/pkgs/development/compilers/symbiflow-yosys/default.nix b/pkgs/development/compilers/symbiflow-yosys/default.nix
deleted file mode 100644
index b33003f312e4..000000000000
--- a/pkgs/development/compilers/symbiflow-yosys/default.nix
+++ /dev/null
@@ -1,37 +0,0 @@
-{ stdenv
-, abc-verifier
-, fetchFromGitHub
-, yosys
-, plugins ? []
-}:
-
-let
-  localAbc-verifier = abc-verifier.overrideAttrs (_: rec {
-    pname = "abc-verifier";
-    version = "2020.06.22";
-
-    src = fetchFromGitHub {
-      owner  = "YosysHQ";
-      repo   = "abc";
-      rev    = "341db25668f3054c87aa3372c794e180f629af5d";
-      sha256 = "14cgv34vz5ljkcms6nrv19vqws2hs8bgjgffk5q03cbxnm2jxv5s";
-    };
-
-    passthru.rev = src.rev;
-  });
-in
-
-(yosys.overrideAttrs (oldAttrs: rec {
-  pname   = "symbiflow-yosys";
-  version = "0.9+2406";
-
-  src = fetchFromGitHub {
-    owner  = "SymbiFlow";
-    repo   = "yosys";
-    rev    = "d8b2d1a2b1a93057678cf49bb8f0329f191faba1";
-    sha256 = "1w8jnqzabvzixjllhb6ak2n2gmjvsn6qd996i7z70bsq5rgdkq9g";
-  };
-})).override {
-  abc-verifier = localAbc-verifier;
-  plugins = plugins;
-}
diff --git a/pkgs/development/compilers/yosys/default.nix b/pkgs/development/compilers/yosys/default.nix
index a83100911d13..7d2191f8f456 100644
--- a/pkgs/development/compilers/yosys/default.nix
+++ b/pkgs/development/compilers/yosys/default.nix
@@ -1,4 +1,4 @@
-{ stdenv
+{ stdenv, lib
 , abc-verifier
 , bash
 , bison
@@ -12,7 +12,6 @@
 , tcl
 , verilog
 , zlib
-, plugins ? []
 }:
 
 # NOTE: as of late 2020, yosys has switched to an automation robot that
@@ -33,8 +32,6 @@
 # ultimately less confusing than using dates.
 
 stdenv.mkDerivation rec {
-  inherit plugins;
-
   pname   = "yosys";
   version = "0.9+3830";
 
@@ -46,17 +43,21 @@ stdenv.mkDerivation rec {
   };
 
   enableParallelBuilding = true;
-  nativeBuildInputs = [ pkg-config protobuf flex bison python3 ];
+  nativeBuildInputs = [ pkg-config bison flex ];
   buildInputs = [ tcl readline libffi python3 protobuf zlib ];
 
   makeFlags = [ "ENABLE_PROTOBUF=1" "PREFIX=${placeholder "out"}"];
 
-  patchPhase = ''
+  patches = [
+    ./plugin-search-dirs.patch
+  ];
+
+  postPatch = ''
     substituteInPlace ./Makefile \
       --replace 'echo UNKNOWN' 'echo ${builtins.substring 0 10 src.rev}'
+
     chmod +x ./misc/yosys-config.in
-    patchShebangs ./misc/yosys-config.in
-    patchShebangs tests
+    patchShebangs tests ./misc/yosys-config.in
   '';
 
   preBuild = let
@@ -75,7 +76,7 @@ stdenv.mkDerivation rec {
     fi
 
     if ! grep -q "YOSYS_VER := $version" Makefile; then
-      echo "ERROR: yosys version in Makefile isn't equivalent to version of the nix package ($version), failing."
+      echo "ERROR: yosys version in Makefile isn't equivalent to version of the nix package (${version}), failing."
       exit 1
     fi
   '';
@@ -92,16 +93,11 @@ stdenv.mkDerivation rec {
   # add a symlink to fake things so that both variants work the same way. this
   # is also needed at build time for the test suite.
   postBuild   = "ln -sfv ${abc-verifier}/bin/abc ./yosys-abc";
-  postInstall = ''
-    ln -sfv ${abc-verifier}/bin/abc $out/bin/yosys-abc
+  postInstall = "ln -sfv ${abc-verifier}/bin/abc $out/bin/yosys-abc";
 
-    mkdir -p $out/share/yosys/plugins
-    for plugin in $plugins; do
-        ln -sfv $plugin/share/yosys/plugins/* $out/share/yosys/plugins/
-    done
-  '';
+  setupHook = ./setup-hook.sh;
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     description = "Open RTL synthesis framework and tools";
     homepage    = "http://www.clifford.at/yosys/";
     license     = licenses.isc;
diff --git a/pkgs/development/compilers/yosys/plugin-search-dirs.patch b/pkgs/development/compilers/yosys/plugin-search-dirs.patch
new file mode 100644
index 000000000000..0cb0aee9c7ed
--- /dev/null
+++ b/pkgs/development/compilers/yosys/plugin-search-dirs.patch
@@ -0,0 +1,34 @@
+diff --git a/passes/cmds/plugin.cc b/passes/cmds/plugin.cc
+index 3ed19497..f9534bd0 100644
+--- a/passes/cmds/plugin.cc
++++ b/passes/cmds/plugin.cc
+@@ -75,8 +75,27 @@ void load_plugin(std::string filename, std::vector<std::string> aliases)
+ 		#endif
+ 
+ 		void *hdl = dlopen(filename.c_str(), RTLD_LAZY|RTLD_LOCAL);
+-		if (hdl == NULL && orig_filename.find('/') == std::string::npos)
+-			hdl = dlopen((proc_share_dirname() + "plugins/" + orig_filename + ".so").c_str(), RTLD_LAZY|RTLD_LOCAL);
++		if (hdl == NULL && orig_filename.find('/') == std::string::npos) {
++			std::string install_dir = proc_share_dirname() + "plugins";
++
++			vector<string> all_dirs;
++			all_dirs.push_back(install_dir);
++
++			char* plugin_dirs = getenv("NIX_YOSYS_PLUGIN_DIRS");
++			if (plugin_dirs != NULL) {
++				std::string p(plugin_dirs), t;
++				std::stringstream ss(p);
++
++				while(std::getline(ss, t, ':')) {
++					all_dirs.push_back(t);
++				}
++			}
++
++			for (auto dir : all_dirs) {
++				hdl = dlopen((dir + "/" + orig_filename + ".so").c_str(), RTLD_LAZY|RTLD_LOCAL);
++				if (hdl != NULL) break;
++			}
++		}
+ 		if (hdl == NULL)
+ 			log_cmd_error("Can't load module `%s': %s\n", filename.c_str(), dlerror());
+ 		loaded_plugins[orig_filename] = hdl;
diff --git a/pkgs/development/compilers/yosys/plugins/bluespec.nix b/pkgs/development/compilers/yosys/plugins/bluespec.nix
new file mode 100644
index 000000000000..ea67ffc661cb
--- /dev/null
+++ b/pkgs/development/compilers/yosys/plugins/bluespec.nix
@@ -0,0 +1,32 @@
+{ stdenv, lib, fetchFromGitHub, pkg-config
+, yosys, readline, zlib, bluespec
+}:
+
+stdenv.mkDerivation {
+  pname = "yosys-bluespec";
+  version = "2021.01.14";
+
+  src = fetchFromGitHub {
+    owner  = "thoughtpolice";
+    repo   = "yosys-bluespec";
+    rev    = "7a0c609e9b601560067c34b8ce41e89ea4a397d4";
+    sha256 = "0xj9j5dwvq0dwqzfjd4ikmxkd28amj6d9m6ava7pwcrpjhyjnd0c";
+  };
+
+  buildInputs = [ yosys readline zlib bluespec ];
+  nativeBuildInputs = [ pkg-config ];
+
+  doCheck = true;
+  makeFlags = [
+    "PREFIX=$(out)/share/yosys/plugins"
+    "STATIC_BSC_PATH=${bluespec}/bin/bsc"
+    "STATIC_BSC_LIBDIR=${bluespec}/lib"
+  ];
+
+  meta = with lib; {
+    description = "Bluespec plugin for Yosys";
+    license     = licenses.isc;
+    platforms   = platforms.all;
+    maintainers = with maintainers; [ thoughtpolice ];
+  };
+}
diff --git a/pkgs/development/compilers/yosys/plugins/ghdl.nix b/pkgs/development/compilers/yosys/plugins/ghdl.nix
new file mode 100644
index 000000000000..ccf8efc7c805
--- /dev/null
+++ b/pkgs/development/compilers/yosys/plugins/ghdl.nix
@@ -0,0 +1,31 @@
+{ stdenv, lib, fetchFromGitHub, pkg-config
+, yosys, readline, zlib, ghdl
+}:
+
+stdenv.mkDerivation {
+  pname = "yosys-ghdl";
+  version = "2021.01.01";
+
+  src = fetchFromGitHub {
+    owner  = "ghdl";
+    repo   = "ghdl-yosys-plugin";
+    rev    = "8b3e740fef9a653a20a838f1ade475960e1d379b";
+    sha256 = "13kpcp37r11xgqd8aksddi40a5vpzqi7p8qgyjbs99lyscyli75x";
+  };
+
+  buildInputs = [ yosys readline zlib ghdl ];
+  nativeBuildInputs = [ pkg-config ];
+
+  doCheck = true;
+  installPhase = ''
+    mkdir -p $out/share/yosys/plugins
+    cp ghdl.so $out/share/yosys/plugins/ghdl.so
+  '';
+
+  meta = with lib; {
+    description = "GHDL plugin for Yosys";
+    license     = licenses.isc;
+    platforms   = platforms.all;
+    maintainers = with maintainers; [ thoughtpolice ];
+  };
+}
diff --git a/pkgs/development/compilers/yosys/setup-hook.sh b/pkgs/development/compilers/yosys/setup-hook.sh
new file mode 100644
index 000000000000..d01bbdd1a8c1
--- /dev/null
+++ b/pkgs/development/compilers/yosys/setup-hook.sh
@@ -0,0 +1,5 @@
+addYosysPluginPath() {
+  addToSearchPath NIX_YOSYS_PLUGIN_DIRS "$1/share/yosys/plugins"
+}
+
+addEnvHooks "$targetOffset" addYosysPluginPath
diff --git a/pkgs/development/python-modules/python-prjxray/default.nix b/pkgs/development/python-modules/python-prjxray/default.nix
deleted file mode 100644
index 5b92311612b0..000000000000
--- a/pkgs/development/python-modules/python-prjxray/default.nix
+++ /dev/null
@@ -1,44 +0,0 @@
-{ stdenv
-, fetchFromGitHub
-, pkgs
-, buildPythonPackage
-, intervaltree
-, numpy
-, openpyxl
-, parse
-, progressbar
-, pyjson5
-, pyyaml
-, simplejson
-, symbiflow-fasm
-, textx
-}:
-
-buildPythonPackage rec {
-  pname = "python-prjxray";
-  version = pkgs.prjxray-tools.version;
-
-  src = pkgs.prjxray-tools.src;
-
-  propagatedBuildInputs = [
-    intervaltree
-    numpy
-    openpyxl
-    parse
-    progressbar
-    pyjson5
-    pyyaml
-    simplejson
-    symbiflow-fasm
-    textx
-  ];
-
-  doCheck = false;
-
-  meta = with stdenv.lib; {
-    description = "Documenting the Xilinx 7-series bit-stream format";
-    homepage    = "https://github.com/SymbiFlow/prjxray";
-    license     = licenses.isc;
-    maintainers = with maintainers; [ mcaju ];
-  };
-}
diff --git a/pkgs/development/python-modules/symbiflow-fasm/default.nix b/pkgs/development/python-modules/symbiflow-fasm/default.nix
deleted file mode 100644
index 609987441ea6..000000000000
--- a/pkgs/development/python-modules/symbiflow-fasm/default.nix
+++ /dev/null
@@ -1,27 +0,0 @@
-{ stdenv
-, pkgs
-, fetchFromGitHub
-, buildPythonPackage
-, textx
-}:
-
-buildPythonPackage rec {
-  pname = "symbiflow-fasm";
-  version = "0.0.1-g4857dde";
-
-  src = fetchFromGitHub {
-    owner = "SymbiFlow";
-    repo = "fasm";
-    rev = "4857dde757edd88688c2faf808774d85bdbe3900";
-    sha256 = "1za7f8slf8wvp1mfbfc3vdv61115p49k0vwngs4db6ips1qg1435";
-  };
-
-  propagatedBuildInputs = [ textx ];
-
-  meta = with stdenv.lib; {
-    description = "FPGA Assembly (FASM) Parser and Generation library";
-    homepage = "https://github.com/SymbiFlow/fasm";
-    license = licenses.isc;
-    maintainers = with maintainers; [ mcaju ];
-  };
-}
diff --git a/pkgs/development/python-modules/textx/default.nix b/pkgs/development/python-modules/textx/default.nix
deleted file mode 100644
index 07c568b87d48..000000000000
--- a/pkgs/development/python-modules/textx/default.nix
+++ /dev/null
@@ -1,36 +0,0 @@
-{ stdenv
-, buildPythonPackage
-, fetchPypi
-, pytestCheckHook
-, arpeggio
-, click
-, jinja2
-}:
-
-buildPythonPackage rec {
-  pname = "textX";
-  version = "2.2.0";
-
-  src = fetchPypi {
-    inherit pname;
-    inherit version;
-    sha256 = "00mwd588ms96qp27m5vpjkzk30wfw53hnmv8y77slxca8lw9vq82";
-  };
-
-  checkInputs = [ pytestCheckHook ];
-
-  pytestFlagsArray = [ "tests/functional" ];
-
-  propagatedBuildInputs = [
-    arpeggio
-    click
-    jinja2
-  ];
-
-  meta = with stdenv.lib; {
-    description = "textX is a meta-language for building Domain-Specific Languages (DSLs) in Python";
-    homepage = "https://textx.github.io";
-    license = licenses.mit;
-    maintainers = with maintainers; [ mcaju ];
-  };
-}
diff --git a/pkgs/development/python-modules/xc-fasm/default.nix b/pkgs/development/python-modules/xc-fasm/default.nix
deleted file mode 100644
index bf00bb159010..000000000000
--- a/pkgs/development/python-modules/xc-fasm/default.nix
+++ /dev/null
@@ -1,45 +0,0 @@
-{ stdenv
-, fetchFromGitHub
-, buildPythonPackage
-, pytestCheckHook
-, simplejson
-, intervaltree
-, python-prjxray
-, symbiflow-fasm
-, textx
-}:
-
-buildPythonPackage rec {
-  pname = "xc-fasm";
-  version = "0.0.1-g0ddd9516";
-
-  src = fetchFromGitHub {
-    owner = "SymbiFlow";
-    repo = "xc-fasm";
-    rev = "0ddd951602d47d5b95f2072f8aa751af5e81e577";
-    sha256 = "15bzw92sx99s0zldr48na4yhrnp7b90nxsd8ya6ag1pvvijp2al4";
-  };
-
-  propagatedBuildInputs = [
-    simplejson
-    intervaltree
-    python-prjxray
-    symbiflow-fasm
-    textx
-  ];
-
-  # Pip will check for and then install missing dependecies.
-  # Because some of them are installed from git, it will try
-  # to download them even if they're present in
-  # propagatedBuildInputs.
-  pipInstallFlags = [ "--no-deps" ];
-
-  checkInputs = [ pytestCheckHook ];
-
-  meta = with stdenv.lib; {
-    description = "XC FASM libraries";
-    homepage = "https://github.com/SymbiFlow/xc-fasm";
-    license = licenses.isc;
-    maintainers = with maintainers; [ mcaju ];
-  };
-}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 0fabdff4f250..9c2ace49de1e 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -10722,12 +10722,6 @@ in
 
   swift = callPackage ../development/compilers/swift { };
 
-  symbiflow-vtr = callPackage ../development/compilers/symbiflow-vtr { };
-
-  symbiflow-yosys = callPackage ../development/compilers/symbiflow-yosys { };
-
-  symbiflow-yosys-plugins = callPackage ../development/compilers/symbiflow-yosys-plugins { };
-
   swiProlog = callPackage ../development/compilers/swi-prolog {
     inherit (darwin.apple_sdk.frameworks) Security;
     jdk = openjdk8; # TODO: remove override https://github.com/NixOS/nixpkgs/pull/89731
@@ -10840,6 +10834,8 @@ in
   yasm = callPackage ../development/compilers/yasm { };
 
   yosys = callPackage ../development/compilers/yosys { };
+  yosys-bluespec = callPackage ../development/compilers/yosys/plugins/bluespec.nix { };
+  yosys-ghdl = callPackage ../development/compilers/yosys/plugins/ghdl.nix { };
 
   z88dk = callPackage ../development/compilers/z88dk { };
 
@@ -11098,8 +11094,6 @@ in
   polyml56 = callPackage ../development/compilers/polyml/5.6.nix { };
   polyml57 = callPackage ../development/compilers/polyml/5.7.nix { };
 
-  prjxray-tools = callPackage ../development/compilers/prjxray-tools { };
-
   pure = callPackage ../development/interpreters/pure {
     /*llvm = llvm_35;*/
   };
@@ -20634,8 +20628,6 @@ in
     inherit (darwin.apple_sdk.frameworks) Security;
   };
 
-  prjxray-db = callPackage ../data/misc/prjxray-db { };
-
   profont = callPackage ../data/fonts/profont
     { inherit (buildPackages.xorg) mkfontscale; };
 
@@ -20671,8 +20663,6 @@ in
 
   sweet = callPackage ../data/themes/sweet { };
 
-  symbiflow-arch-defs = callPackage ../data/misc/symbiflow-arch-defs { };
-
   mime-types = callPackage ../data/misc/mime-types { };
 
   shared-mime-info = callPackage ../data/misc/shared-mime-info { };
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index cb786ff781ef..af5b796ee29e 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -4812,8 +4812,6 @@ in {
 
   python-openems = callPackage ../development/python-modules/python-openems { };
 
-  python-prjxray = callPackage ../development/python-modules/python-prjxray { };
-
   python-tado = callPackage ../development/python-modules/python-tado { };
 
   pkutils = callPackage ../development/python-modules/pkutils { };
@@ -7407,8 +7405,6 @@ in {
 
   sybil = callPackage ../development/python-modules/sybil { };
 
-  symbiflow-fasm = callPackage ../development/python-modules/symbiflow-fasm { };
-
   symengine = callPackage ../development/python-modules/symengine { symengine = pkgs.symengine; };
 
   sympy = if isPy3k then
@@ -7526,8 +7522,6 @@ in {
 
   textfsm = callPackage ../development/python-modules/textfsm { };
 
-  textx = callPackage ../development/python-modules/textx { };
-
   testpath = callPackage ../development/python-modules/testpath { };
 
   testrepository = callPackage ../development/python-modules/testrepository { };
@@ -8179,8 +8173,6 @@ in {
 
   xattr = callPackage ../development/python-modules/xattr { };
 
-  xc-fasm = callPackage ../development/python-modules/xc-fasm { };
-
   xcaplib = callPackage ../development/python-modules/xcaplib { };
 
   xcffib = callPackage ../development/python-modules/xcffib { };