diff --git a/build.sh b/build.sh
index 928149e..daff933 100755
--- a/build.sh
+++ b/build.sh
@@ -1,21 +1,17 @@
 #!/bin/sh -x
 set -e
 
-win_nextpnr_url="https://github.com/xobs/toolchain-nextpnr-ice40/releases/download/v1.46-fomu/nextpnr-ice40-windows_amd64-v1.46-fomu.zip"
-win_yosys_url="https://github.com/xobs/toolchain-icestorm/releases/download/v1.43-fomu/toolchain-icestorm-windows_amd64-v1.43-fomu.zip"
+win_openfpgatoolchain_url="https://github.com/open-tool-forge/fpga-toolchain/releases/download/nightly-20201010/fpga-toolchain-windows_amd64-nightly-20201010.zip"
 win_wishbone_tool_url="https://github.com/litex-hub/wishbone-utils/releases/download/v0.6.10/wishbone-tool-v0.6.10-x86_64-pc-windows-gnu.tar.gz"
 win_riscv_url="https://static.dev.sifive.com/dev-tools/riscv64-unknown-elf-gcc-8.3.0-2019.08.0-x86_64-w64-mingw32.zip"
-win_python_url="https://www.python.org/ftp/python/3.7.3/python-3.7.3-embed-amd64.zip"
 win_make_url="https://sourceforge.net/projects/ezwinports/files/make-4.3-without-guile-w32-bin.zip/download"
 win_teraterm_url="https://osdn.net/frs/redir.php?m=constant&f=ttssh2%2F71232%2Fteraterm-4.103.zip"
 
-mac_nextpnr_url="https://github.com/xobs/toolchain-nextpnr-ice40/releases/download/v1.46-fomu/nextpnr-ice40-darwin-v1.46-fomu.tar.gz"
-mac_yosys_url="https://github.com/xobs/toolchain-icestorm/releases/download/v1.43-fomu/toolchain-icestorm-darwin-v1.43-fomu.tar.gz"
+mac_openfpgatoolchain_url="https://github.com/open-tool-forge/fpga-toolchain/releases/download/nightly-20201010/fpga-toolchain-darwin-nightly-20201010.tar.xz"
 mac_wishbone_tool_url="https://github.com/litex-hub/wishbone-utils/releases/download/v0.6.10/wishbone-tool-v0.6.10-x86_64-apple-darwin.tar.gz"
 mac_riscv_url="https://static.dev.sifive.com/dev-tools/riscv64-unknown-elf-gcc-8.3.0-2019.08.0-x86_64-apple-darwin.tar.gz"
 
-linux_nextpnr_url="https://github.com/xobs/toolchain-nextpnr-ice40/releases/download/v1.46-fomu/nextpnr-ice40-linux_x86_64-v1.46-fomu.tar.gz"
-linux_yosys_url="https://github.com/xobs/toolchain-icestorm/releases/download/v1.43-fomu/toolchain-icestorm-linux_x86_64-v1.43-fomu.tar.gz"
+linux_openfpgatoolchain_url="https://github.com/open-tool-forge/fpga-toolchain/releases/download/nightly-20201010/fpga-toolchain-linux_x86_64-nightly-20201010.tar.xz"
 linux_wishbone_tool_url="https://github.com/litex-hub/wishbone-utils/releases/download/v0.6.10/wishbone-tool-v0.6.10-x86_64-unknown-linux-gnu.tar.gz"
 linux_riscv_url="https://static.dev.sifive.com/dev-tools/riscv64-unknown-elf-gcc-8.3.0-2019.08.0-x86_64-linux-centos6.tar.gz"
 
@@ -51,16 +47,10 @@ extract_zip() {
 
 case "${ARCH}" in
     "Windows")
-        # Python 3.7.3 (which matches the version in nextpnr)
-        extract_zip $win_python_url $input/python-${ARCH}.zip  "/bin"
-        rm python37.zip # we already have this unzipped from nextpnr-ice40
-        rm -f python37._pth # If this file is present, PYTHONPATH is very broken
-
-        # Nextpnr
-        extract_zip $win_nextpnr_url $input/nextpnr-${ARCH}.zip "/bin"
-
-        # Yosys, icestorm, and dfu_util
-        extract_zip $win_yosys_url $input/yosys-${ARCH}.zip
+        # Open FPGA toolchain
+        wget -O $input/openfpgatoolchain-${ARCH}.zip $win_openfpgatoolchain_url
+        unzip $input/openfpgatoolchain-${ARCH}.zip
+        mv fpga-toolchain/* $output/
 
         # Teraterm Terminal
         extract_zip $win_teraterm_url $input/teraterm-${ARCH}.zip "/bin"
@@ -91,11 +81,9 @@ case "${ARCH}" in
         ;;
 
     "macOS")
-        # Nextpnr
-        curl -fsSL $mac_nextpnr_url | tar xvzf - -C $output
-
-        # Yosys, icestorm, and dfu_util
-        curl -fsSL $mac_yosys_url | tar xvzf - -C $output
+        # Open FPGA toolchain
+        curl -fsSL $mac_openfpgatoolchain_url | tar xvJf - -C $input
+        mv $input/fpga-toolchain/* $output/
 
         # Wishbone Tool
         curl -fsSL $mac_wishbone_tool_url | tar xvzf - -C $output/bin
@@ -118,11 +106,9 @@ case "${ARCH}" in
         ;;
 
     "Linux")
-        # Nextpnr
-        curl -fsSL $linux_nextpnr_url | tar xvzf - -C $output
-
-        # Yosys, icestorm, and dfu_util
-        curl -fsSL $linux_yosys_url | tar xvzf - -C $output
+        # Open FPGA toolchain
+        curl -fsSL $linux_openfpgatoolchain_url | tar xvJf - -C $input
+        mv $input/fpga-toolchain/* $output/
 
         # Wishbone Tool
         curl -fsSL $linux_wishbone_tool_url | tar xvzf - -C $output/bin
@@ -130,7 +116,7 @@ case "${ARCH}" in
         # Riscv Toolchain
         # Note that we want to strip the front part of the path.
         # Also, we do "cp -l" then "rm -rf" to merge the directories.
-        wget -O $input/riscv-${ARCH}.tar.gz  $linux_riscv_url
+        wget -O $input/riscv-${ARCH}.tar.gz $linux_riscv_url
         cd $input
         mkdir re
         cd re