diff --git a/artiq-fast/conda/bscan-spi-bitstreams.nix b/artiq-fast/conda/bscan-spi-bitstreams.nix
index e70379c..ba78405 100644
--- a/artiq-fast/conda/bscan-spi-bitstreams.nix
+++ b/artiq-fast/conda/bscan-spi-bitstreams.nix
@@ -6,7 +6,7 @@ let
     mkdir -p $out/fake-conda;
 
     # work around yet more idiotic conda behavior - build breaks if write permissions aren't set on source files.
-    cp --no-preserve=mode,ownership -R ${bscan_spi_bitstreams} workaround-conda
+    cp --no-preserve=mode,ownership -L -R ${bscan_spi_bitstreams} workaround-conda
     pushd workaround-conda
     tar cf $out/src.tar .
     popd
diff --git a/artiq-fast/default.nix b/artiq-fast/default.nix
index 46be656..d3af6aa 100644
--- a/artiq-fast/default.nix
+++ b/artiq-fast/default.nix
@@ -2,7 +2,8 @@
 with pkgs;
 let
   artiq6 = pkgs.lib.strings.versionAtLeast mainPackages.artiq.version "6.0";
-  pythonDeps = import ./pkgs/python-deps.nix { inherit (pkgs) lib fetchgit fetchFromGitHub python3Packages; misoc-new = artiq6; };
+  artiq7 = pkgs.lib.strings.versionAtLeast mainPackages.artiq.version "7.0";
+  pythonDeps = import ./pkgs/python-deps.nix { inherit (pkgs) lib fetchgit fetchFromGitHub python3Packages; misoc-new = artiq7; };
 
   boards = [
     { target = "kasli"; variant = "tester"; }
@@ -35,7 +36,7 @@ let
     libartiq-support = callPackage ./pkgs/libartiq-support.nix { inherit rustc; };
     artiq = callPackage ./pkgs/artiq.nix { inherit pythonDeps binutils-or1k binutils-arm llvm-or1k llvmlite-artiq libartiq-support lit outputcheck; };
     artiq-env = (pkgs.python3.withPackages(ps: [ artiq ])).overrideAttrs (oldAttrs: { name = "${pkgs.python3.name}-artiq-env-${artiq.version}"; });
-    openocd = callPackage ./pkgs/openocd.nix { autoreconfHook = pkgs.autoreconfHook269 or pkgs.autoreconfHook; };
+    openocd = callPackage ./pkgs/openocd.nix { };
   };
 
   condaNoarch = {
@@ -76,7 +77,7 @@ let
     };
     conda-bscan-spi-bitstreams = import ./conda/bscan-spi-bitstreams.nix {
       inherit pkgs;
-      inherit (mainPackages.openocd) bscan_spi_bitstreams;
+      bscan_spi_bitstreams = "${mainPackages.openocd}/share/bscan-spi-bitstreams";
     };
     conda-artiq = import ./conda/artiq.nix { inherit pkgs; };
     conda-asyncserial = import ./conda/build.nix { inherit pkgs; } {
diff --git a/artiq-fast/pkgs/openocd-jtagspi.diff b/artiq-fast/pkgs/openocd-jtagspi.diff
new file mode 100644
index 0000000..fa41f94
--- /dev/null
+++ b/artiq-fast/pkgs/openocd-jtagspi.diff
@@ -0,0 +1,24 @@
+diff --git a/src/flash/nor/spi.c b/src/flash/nor/spi.c
+index af72ffc4..e5c9a9bd 100644
+--- a/src/flash/nor/spi.c
++++ b/src/flash/nor/spi.c
+@@ -90,8 +90,8 @@ const struct flash_device flash_devices[] = {
+ 	FLASH_ID("mac 25r6435f",        0x03, 0x00, 0x02, 0xd8, 0xc7, 0x001728c2, 0x100, 0x10000, 0x800000),
+ 	FLASH_ID("micron n25q064",      0x03, 0xeb, 0x02, 0xd8, 0xc7, 0x0017ba20, 0x100, 0x10000, 0x800000),
+ 	FLASH_ID("micron n25q128",      0x03, 0xeb, 0x02, 0xd8, 0xc7, 0x0018ba20, 0x100, 0x10000, 0x1000000),
+-	FLASH_ID("micron n25q256 3v",   0x13, 0xec, 0x12, 0xdc, 0xc7, 0x0019ba20, 0x100, 0x10000, 0x2000000),
+-	FLASH_ID("micron n25q256 1.8v", 0x13, 0xec, 0x12, 0xdc, 0xc7, 0x0019bb20, 0x100, 0x10000, 0x2000000),
++	FLASH_ID("micron n25q256 3v",   0x03, 0xeb, 0x02, 0xd8, 0xc7, 0x0019ba20, 0x100, 0x10000, 0x2000000),
++	FLASH_ID("micron n25q256 1.8v", 0x03, 0xeb, 0x02, 0xd8, 0xc7, 0x0019bb20, 0x100, 0x10000, 0x2000000),
+ 	FLASH_ID("micron mt25ql512",    0x13, 0xec, 0x12, 0xdc, 0xc7, 0x0020ba20, 0x100, 0x10000, 0x4000000),
+ 	FLASH_ID("micron mt25ql01",     0x13, 0xec, 0x12, 0xdc, 0xc7, 0x0021ba20, 0x100, 0x10000, 0x8000000),
+ 	FLASH_ID("micron mt25ql02",     0x13, 0xec, 0x12, 0xdc, 0xc7, 0x0022ba20, 0x100, 0x10000, 0x10000000),
+@@ -124,7 +124,7 @@ const struct flash_device flash_devices[] = {
+ 	FLASH_ID("issi is25lp064",      0x03, 0x00, 0x02, 0xd8, 0xc7, 0x0017609d, 0x100, 0x10000, 0x800000),
+ 	FLASH_ID("issi is25lp128d",     0x03, 0xeb, 0x02, 0xd8, 0xc7, 0x0018609d, 0x100, 0x10000, 0x1000000),
+ 	FLASH_ID("issi is25wp128d",     0x03, 0xeb, 0x02, 0xd8, 0xc7, 0x0018709d, 0x100, 0x10000, 0x1000000),
+-	FLASH_ID("issi is25lp256d",     0x13, 0xec, 0x12, 0xdc, 0xc7, 0x0019609d, 0x100, 0x10000, 0x2000000),
++	FLASH_ID("issi is25lp256d",     0x03, 0xeb, 0x02, 0xd8, 0xc7, 0x0019609d, 0x100, 0x10000, 0x2000000),
+ 	FLASH_ID("issi is25wp256d",     0x13, 0xec, 0x12, 0xdc, 0xc7, 0x0019709d, 0x100, 0x10000, 0x2000000),
+ 	FLASH_ID("issi is25lp512m",     0x13, 0xec, 0x12, 0xdc, 0xc7, 0x001a609d, 0x100, 0x10000, 0x4000000),
+ 	FLASH_ID("issi is25wp512m",     0x13, 0xec, 0x12, 0xdc, 0xc7, 0x001a709d, 0x100, 0x10000, 0x4000000),
diff --git a/artiq-fast/pkgs/openocd.nix b/artiq-fast/pkgs/openocd.nix
index 9d32c24..3f3070c 100644
--- a/artiq-fast/pkgs/openocd.nix
+++ b/artiq-fast/pkgs/openocd.nix
@@ -1,74 +1,26 @@
-{ stdenv, lib, fetchFromGitHub, autoreconfHook, libftdi, libusb1, pkgconfig, hidapi }:
-
-stdenv.mkDerivation rec {
-  pname = "openocd-mlabs";
-  version = "0.10.0";
-
-  src = fetchFromGitHub {
-      owner = "m-labs";
-      repo = "openocd";
-      fetchSubmodules = true;
-      rev = "c383a57adcff332b2c5cf8d55a84626285b42c2c";
-      sha256 = "0xlj9cs72acx3zqagvr7f1c0v6lnqhl8fgrlhgmhmvk5n9knk492";
-  };
-  bscan_spi_bitstreams = fetchFromGitHub {
+{ stdenv, buildEnv, lib, fetchFromGitHub, openocd }:
+let
+  bscan_spi_bitstreams-pkg = stdenv.mkDerivation {
+    name = "bscan_spi_bitstreams";
+    src = fetchFromGitHub {
       owner = "quartiq";
       repo = "bscan_spi_bitstreams";
       rev = "01d8f819f15baf9a8cc5d96945a51e4d267ff564";
       sha256 = "1zqv47kzgvbn4c8cr019a6wcja7gn5h1z4kvw5bhpc72fyhagal9";
-  };
-
-  nativeBuildInputs = [ pkgconfig ];
-  buildInputs = [ autoreconfHook libftdi libusb1 hidapi ];
-
-  configureFlags = [
-    "--enable-jtag_vpi"
-    "--enable-usb_blaster_libftdi"
-    "--enable-amtjtagaccel"
-    "--enable-gw16012"
-    "--enable-presto_libftdi"
-    "--enable-openjtag_ftdi"
-    "--enable-oocd_trace"
-    "--enable-buspirate"
-    "--enable-sysfsgpio"
-    "--enable-remote-bitbang"
-    "--disable-werror"
-  ];
-
-  NIX_CFLAGS_COMPILE = [
-    "-Wno-implicit-fallthrough"
-    "-Wno-format-truncation"
-    "-Wno-format-overflow"
-    "-Wno-error=tautological-compare"
-  ];
-
-  postInstall = ''
-    mkdir -p "$out/etc/udev/rules.d"
-    rules="$out/share/openocd/contrib/60-openocd.rules"
-    if [ ! -f "$rules" ]; then
-        echo "$rules is missing, must update the Nix file."
-        exit 1
-    fi
-    ln -s "$rules" "$out/etc/udev/rules.d/"
-
-    mkdir -p "$out/share/bscan-spi-bitstreams"
-    cp ${bscan_spi_bitstreams}/*.bit "$out/share/bscan-spi-bitstreams"
-  '';
-
-  meta = with lib; {
-    description = "Free and Open On-Chip Debugging, In-System Programming and Boundary-Scan Testing";
-    longDescription = ''
-      OpenOCD provides on-chip programming and debugging support with a layered
-      architecture of JTAG interface and TAP support, debug target support
-      (e.g. ARM, MIPS), and flash chip drivers (e.g. CFI, NAND, etc.).  Several
-      network interfaces are available for interactiving with OpenOCD: HTTP,
-      telnet, TCL, and GDB.  The GDB server enables OpenOCD to function as a
-      "remote target" for source-level debugging of embedded systems using the
-      GNU GDB program.
+    };
+    phases = ["installPhase"];
+    installPhase =
+    ''
+    mkdir -p $out/share/bscan-spi-bitstreams
+    cp $src/*.bit $out/share/bscan-spi-bitstreams
     '';
-    homepage = http://openocd.sourceforge.net/;
-    license = licenses.gpl2Plus;
-    maintainers = with maintainers; [ sb0 ];
-    platforms = platforms.linux;
   };
-}
+  # https://docs.lambdaconcept.com/screamer/troubleshooting.html#error-contents-differ
+  openocd-fixed = openocd.overrideAttrs(oa: {
+    patches = oa.patches or [] ++ [ ./openocd-jtagspi.diff ];
+  });
+in
+  buildEnv {
+    name = "openocd-bscanspi";
+    paths = [ openocd-fixed bscan_spi_bitstreams-pkg ];
+  }
diff --git a/artiq-fast/pkgs/python-deps.nix b/artiq-fast/pkgs/python-deps.nix
index bb939f6..fd15a96 100644
--- a/artiq-fast/pkgs/python-deps.nix
+++ b/artiq-fast/pkgs/python-deps.nix
@@ -86,21 +86,21 @@ rec {
 
   misoc = python3Packages.buildPythonPackage {
     pname = "misoc";
-    version = if misoc-new then "unstable-2021-02-15" else "unstable-2020-05-29";
+    version = if misoc-new then "unstable-2021-07-29" else "unstable-2021-02-15";
 
     src = if misoc-new
       then (fetchFromGitHub {
         owner = "m-labs";
         repo = "misoc";
-        rev = "d84551418042cea0891ea743442e20684b51e77a";
-        sha256 = "1id5qjr9dl4r3vi6jdn7dfpnr2wb08nrm3nfscn18clbbdxybyjn";
+        rev = "f048d1fbfd48c93542d2f1e591139f95c7c9cde6";
+        sha256 = "1ny0d0q6mnjsxq746q4chn2grfac8brs4w60k9fxk2h5abvfgij8";
         fetchSubmodules = true;
       })
       else (fetchFromGitHub {
         owner = "m-labs";
         repo = "misoc";
-        rev = "7e5fe8d38835175202dad2c51d37b20b76fd9e16";
-        sha256 = "0i8bppz7x2s45lx9n49c0r87pqps09z35yzc17amvx21qsplahxn";
+        rev = "d84551418042cea0891ea743442e20684b51e77a";
+        sha256 = "1id5qjr9dl4r3vi6jdn7dfpnr2wb08nrm3nfscn18clbbdxybyjn";
         fetchSubmodules = true;
       });
 
diff --git a/artiq-zynq.nix b/artiq-zynq.nix
index 2423339..7d1518f 100644
--- a/artiq-zynq.nix
+++ b/artiq-zynq.nix
@@ -45,7 +45,6 @@ in
         export SZL=${szlEnv}
         pushd ${<artiq-zynq>}
         export NIX_SSHOPTS="-F /dev/null -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=ERROR -i /opt/hydra_id_rsa"
-        ssh $NIX_SSHOPTS rpi-4 "nix-store -r ${<nixpkgs>} --add-root openocd-pkgs --indirect && nix-env -e openocd && nix-env -iA openocd -f openocd-pkgs && rm openocd-pkgs"
         bash ${<artiq-zynq>}/remote_run.sh -h rpi-4 -o "$NIX_SSHOPTS" -d ${artiq-zynq.zc706-nist_qc2-jtag}
         popd
 
diff --git a/hydra/artiq.json b/hydra/artiq.json
index 73c1aa3..88db575 100644
--- a/hydra/artiq.json
+++ b/hydra/artiq.json
@@ -65,7 +65,7 @@
         "emailoverride": "",
         "keepnr": 10,
         "inputs": {
-            "nixpkgs": { "type": "git", "value": "git://github.com/NixOS/nixpkgs nixos-20.09", "emailresponsible": false },
+            "nixpkgs": { "type": "git", "value": "git://github.com/NixOS/nixpkgs nixos-21.05", "emailresponsible": false },
             "nixScripts": { "type": "git", "value": "https://git.m-labs.hk/M-Labs/nix-scripts.git", "emailresponsible": false },
             "artiqSrc": { "type": "git", "value": "git://github.com/m-labs/artiq.git release-6 1", "emailresponsible": false }
         }
@@ -82,7 +82,7 @@
         "emailoverride": "",
         "keepnr": 10,
         "inputs": {
-            "nixpkgs": { "type": "git", "value": "git://github.com/NixOS/nixpkgs nixos-20.09", "emailresponsible": false },
+            "nixpkgs": { "type": "git", "value": "git://github.com/NixOS/nixpkgs nixos-21.05", "emailresponsible": false },
             "nixScripts": { "type": "git", "value": "https://git.m-labs.hk/M-Labs/nix-scripts.git", "emailresponsible": false },
             "sinaraSystemsSrc": { "type": "git", "value": "https://git.m-labs.hk/M-Labs/sinara-systems.git master 1", "emailresponsible": false },
             "artiq-fast": { "type": "sysbuild", "value": "artiq:fast:generated-nix", "emailresponsible": false }
@@ -100,7 +100,7 @@
         "emailoverride": "",
         "keepnr": 10,
         "inputs": {
-            "nixpkgs": { "type": "git", "value": "git://github.com/NixOS/nixpkgs nixos-20.09", "emailresponsible": false },
+            "nixpkgs": { "type": "git", "value": "git://github.com/NixOS/nixpkgs nixos-21.05", "emailresponsible": false },
             "nixScripts": { "type": "git", "value": "https://git.m-labs.hk/M-Labs/nix-scripts.git", "emailresponsible": false },
             "a6p": { "type": "boolean", "value": "true" },
             "artiq-board-generated": { "type": "sysbuild", "value": "artiq:board-generated:generated-nix", "emailresponsible": false }
@@ -119,7 +119,7 @@
         "emailoverride": "",
         "keepnr": 10,
         "inputs": {
-            "nixpkgs": { "type": "git", "value": "git://github.com/NixOS/nixpkgs nixos-20.09", "emailresponsible": false },
+            "nixpkgs": { "type": "git", "value": "git://github.com/NixOS/nixpkgs nixos-21.05", "emailresponsible": false },
             "nixScripts": { "type": "git", "value": "https://git.m-labs.hk/M-Labs/nix-scripts.git", "emailresponsible": false },
             "artiqSrc": { "type": "git", "value": "git://github.com/m-labs/artiq.git release-5 1", "emailresponsible": false }
         }
@@ -136,7 +136,7 @@
         "emailoverride": "",
         "keepnr": 10,
         "inputs": {
-            "nixpkgs": { "type": "git", "value": "git://github.com/NixOS/nixpkgs nixos-20.09", "emailresponsible": false },
+            "nixpkgs": { "type": "git", "value": "git://github.com/NixOS/nixpkgs nixos-21.05", "emailresponsible": false },
             "nixScripts": { "type": "git", "value": "https://git.m-labs.hk/M-Labs/nix-scripts.git", "emailresponsible": false },
             "sinaraSystemsSrc": { "type": "git", "value": "https://git.m-labs.hk/M-Labs/sinara-systems.git master 1", "emailresponsible": false },
             "a6p": { "type": "boolean", "value": "false" },
@@ -220,7 +220,7 @@
         "emailoverride": "",
         "keepnr": 10,
         "inputs": {
-            "nixpkgs": { "type": "git", "value": "git://github.com/NixOS/nixpkgs nixos-20.09", "emailresponsible": false },
+            "nixpkgs": { "type": "git", "value": "git://github.com/NixOS/nixpkgs nixos-21.05", "emailresponsible": false },
             "nixScripts": { "type": "git", "value": "https://git.m-labs.hk/M-Labs/nix-scripts.git", "emailresponsible": false },
             "artiq-fast": { "type": "sysbuild", "value": "artiq:fast:generated-nix", "emailresponsible": false },
             "artiq-zynq": { "type": "git", "value": "https://git.m-labs.hk/M-Labs/artiq-zynq.git release-6", "emailresponsible": false },