diff --git a/artiq/firmware/Cargo.lock b/artiq/firmware/Cargo.lock
index e5d303a00..b9ea50504 100644
--- a/artiq/firmware/Cargo.lock
+++ b/artiq/firmware/Cargo.lock
@@ -1,10 +1,42 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
 [[package]]
-name = "aho-corasick"
-version = "0.7.18"
+name = "addr2line"
+version = "0.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e37cfd5e7657ada45f742d6e99ca5788580b5c529dc78faf11ece6dc702656f"
+checksum = "7c0929d69e78dd9bf5408269919fcbcaeb2e35e5d43e5815517cdc6a8e11a423"
+dependencies = [
+ "cpp_demangle",
+ "fallible-iterator",
+ "gimli",
+ "object",
+ "rustc-demangle",
+ "smallvec",
+]
+
+[[package]]
+name = "adler"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee2a4ec343196209d6594e19543ae87a39f96d5534d7174822a3ad825dd6ed7e"
+
+[[package]]
+name = "adler"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
+
+[[package]]
+name = "ahash"
+version = "0.4.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0453232ace82dee0dd0b4c87a59bd90f7b53b314f3e0f61fe2ee7c8a16482289"
+
+[[package]]
+name = "aho-corasick"
+version = "0.7.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7404febffaa47dac81aa44dba71523c9d069b1bdc50a77db41195149e17f68e5"
 dependencies = [
  "memchr",
 ]
@@ -24,9 +56,9 @@ dependencies = [
 
 [[package]]
 name = "bit_field"
-version = "0.10.1"
+version = "0.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dcb6dd1c2376d2e096796e234a70e17e94cc2d5d54ff8ce42b28cef1d0d359a4"
+checksum = "dc827186963e592360843fb5ba4b973e145841266c1357f7180c43526f2e5b61"
 
 [[package]]
 name = "bitflags"
@@ -66,12 +98,26 @@ dependencies = [
 name = "bootloader"
 version = "0.0.0"
 dependencies = [
+ "addr2line",
  "board_misoc",
  "build_misoc",
  "byteorder",
+ "cc",
+ "compiler_builtins",
  "crc",
+ "dlmalloc",
+ "fortanix-sgx-abi",
+ "getopts",
+ "hashbrown",
+ "hermit-abi",
+ "libc 0.2.79",
+ "memchr",
+ "miniz_oxide 0.4.0",
  "riscv",
+ "rustc-demangle",
  "smoltcp",
+ "unicode-width",
+ "wasi",
 ]
 
 [[package]]
@@ -92,9 +138,9 @@ checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
 
 [[package]]
 name = "cc"
-version = "1.0.70"
+version = "1.0.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d26a6ce4b6a484fa3edb70f7efa6fc430fd2b87285fe8b84304fd0936faa0dc0"
+checksum = "ef611cc68ff783f18535d77ddd080185275713d852c4f5cbb6122c462a7a825c"
 
 [[package]]
 name = "cfg-if"
@@ -114,6 +160,15 @@ version = "0.1.39"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3748f82c7d366a0b4950257d19db685d4958d2fa27c6d164a3f069fec42b748b"
 
+[[package]]
+name = "cpp_demangle"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eeaa953eaad386a53111e47172c2fedba671e5684c8dd601a5f474f4f118710f"
+dependencies = [
+ "cfg-if 1.0.0",
+]
+
 [[package]]
 name = "crc"
 version = "1.8.1"
@@ -123,12 +178,30 @@ dependencies = [
  "build_const",
 ]
 
+[[package]]
+name = "crc32fast"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a97769d94ddab943e4510d138150169a2758b5ef3eb191a9ee688de3e23ef7b3"
+dependencies = [
+ "cfg-if 1.0.0",
+]
+
 [[package]]
 name = "cslice"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0f8cb7306107e4b10e64994de6d3274bd08996a7c1322a27b86482392f96be0a"
 
+[[package]]
+name = "dlmalloc"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "332570860c2edf2d57914987bf9e24835425f75825086b6ba7d1e6a3e4f1f254"
+dependencies = [
+ "libc 0.2.79",
+]
+
 [[package]]
 name = "dyld"
 version = "0.0.0"
@@ -137,7 +210,6 @@ version = "0.0.0"
 name = "eh"
 version = "0.0.0"
 dependencies = [
- "compiler_builtins",
  "cslice",
  "libc 0.1.0",
  "unwind",
@@ -160,12 +232,71 @@ dependencies = [
  "synstructure",
 ]
 
+[[package]]
+name = "fallible-iterator"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4443176a9f2c162692bd3d352d745ef9413eec5782a80d8fd6f8a1ac692a07f7"
+
+[[package]]
+name = "flate2"
+version = "1.0.30"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f54427cfd1c7829e2a139fcefea601bf088ebca651d2bf53ebc600eac295dae"
+dependencies = [
+ "crc32fast",
+ "miniz_oxide 0.7.3",
+]
+
+[[package]]
+name = "fortanix-sgx-abi"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c56c422ef86062869b2d57ae87270608dc5929969dd130a6e248979cf4fb6ca6"
+
 [[package]]
 name = "fringe"
 version = "1.2.1"
 source = "git+https://git.m-labs.hk/M-Labs/libfringe.git?rev=3ecbe5#3ecbe53f7644b18ee46ebd5b2ca12c9cbceec43a"
 dependencies = [
- "libc 0.2.101",
+ "libc 0.2.79",
+]
+
+[[package]]
+name = "getopts"
+version = "0.2.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "14dbbfd5c71d70241ecf9e6f13737f7b5ce823821063188d7e46c41d371eebd5"
+dependencies = [
+ "unicode-width",
+]
+
+[[package]]
+name = "gimli"
+version = "0.23.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f6503fe142514ca4799d4c26297c4248239fe8838d827db6bd6065c6ed29a6ce"
+dependencies = [
+ "fallible-iterator",
+ "stable_deref_trait",
+]
+
+[[package]]
+name = "hashbrown"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "00d63df3d41950fb462ed38308eea019113ad1508da725bbedcd0fa5a85ef5f7"
+dependencies = [
+ "ahash",
+]
+
+[[package]]
+name = "hermit-abi"
+version = "0.1.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5aca5565f760fb5b220e499d72710ed156fdb74e631659e99377d9ebfbd13ae8"
+dependencies = [
+ "libc 0.2.79",
 ]
 
 [[package]]
@@ -206,9 +337,9 @@ version = "0.1.0"
 
 [[package]]
 name = "libc"
-version = "0.2.101"
+version = "0.2.79"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3cb00336871be5ed2c8ed44b60ae9959dc5b9f08539422ed43f09e34ecaeba21"
+checksum = "2448f6066e80e3bfc792e9c98bf705b4b0fc6e8ef5b43e5889aff0eaa9c58743"
 
 [[package]]
 name = "log"
@@ -242,9 +373,37 @@ checksum = "c75de51135344a4f8ed3cfe2720dc27736f7711989703a0b43aadf3753c55577"
 
 [[package]]
 name = "memchr"
-version = "2.4.1"
+version = "2.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "308cc39be01b73d0d18f82a0e7b2a3df85245f84af96fdddc5d202d27e47b86a"
+checksum = "0ee1c47aaa256ecabcaea351eae4a9b01ef39ed810004e298d2511ed284b1525"
+
+[[package]]
+name = "miniz_oxide"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be0f75932c1f6cfae3c04000e40114adf955636e19040f9c0a2c380702aa1c7f"
+dependencies = [
+ "adler 0.2.3",
+]
+
+[[package]]
+name = "miniz_oxide"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "87dfd01fe195c66b572b37921ad8803d010623c0aca821bea2302239d155cdae"
+dependencies = [
+ "adler 1.0.2",
+]
+
+[[package]]
+name = "object"
+version = "0.22.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8d3b63360ec3cb337817c2dbd47ab4a0f170d285d8e5a2064600f3def1402397"
+dependencies = [
+ "flate2",
+ "wasmparser",
+]
 
 [[package]]
 name = "proto_artiq"
@@ -268,9 +427,9 @@ checksum = "7a6e920b65c65f10b2ae65c831a81a073a89edd28c7cce89475bff467ab4167a"
 
 [[package]]
 name = "regex"
-version = "1.5.4"
+version = "1.4.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d07a8629359eb56f1e2fb1652bb04212c072a87ba68546a04065d525673ac461"
+checksum = "2a26af418b574bd56588335b3a3659a65725d4e636eb1016c2f9e3b38c7cc759"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -279,9 +438,9 @@ dependencies = [
 
 [[package]]
 name = "regex-syntax"
-version = "0.6.25"
+version = "0.6.29"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f497285884f3fcff424ffc933e56d7cbca511def0c9831a7f9b5f6153e3cc89b"
+checksum = "f162c6dd7b008981e4d40210aca20b4bd0f9b60ca9271061b07f78537722f2e1"
 
 [[package]]
 name = "riscv"
@@ -328,6 +487,12 @@ dependencies = [
  "unwind_backtrace",
 ]
 
+[[package]]
+name = "rustc-demangle"
+version = "0.1.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e3bad0ee36814ca07d7968269dd4b7ec89ec2da10c4bb613928d3077083c232"
+
 [[package]]
 name = "rustc_version"
 version = "0.2.3"
@@ -363,6 +528,12 @@ version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 
+[[package]]
+name = "smallvec"
+version = "1.13.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c5e1a9a646d36c3599cd173a41282daf47c44583ad367b8e6837255952e5c67"
+
 [[package]]
 name = "smoltcp"
 version = "0.6.0"
@@ -374,6 +545,12 @@ dependencies = [
  "managed",
 ]
 
+[[package]]
+name = "stable_deref_trait"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8f112729512f8e442d81f95a8a7ddf2b7c6b8a1a6f509a95864142b30cab2d3"
+
 [[package]]
 name = "syn"
 version = "0.11.11"
@@ -404,6 +581,12 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "unicode-width"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9337591893a19b88d8d87f2cec1e73fad5cdfd10e5a6f349f498ad6ea2ffb1e3"
+
 [[package]]
 name = "unicode-xid"
 version = "0.0.4"
@@ -425,3 +608,15 @@ dependencies = [
  "libc 0.1.0",
  "unwind",
 ]
+
+[[package]]
+name = "wasi"
+version = "0.9.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
+
+[[package]]
+name = "wasmparser"
+version = "0.57.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32fddd575d477c6e9702484139cf9f23dcd554b06d185ed0f56c857dd3a47aa6"
diff --git a/artiq/firmware/bootloader/Cargo.toml b/artiq/firmware/bootloader/Cargo.toml
index 5c2a54ba5..d804518e6 100644
--- a/artiq/firmware/bootloader/Cargo.toml
+++ b/artiq/firmware/bootloader/Cargo.toml
@@ -13,8 +13,25 @@ path = "main.rs"
 build_misoc = { path = "../libbuild_misoc" }
 
 [dependencies]
-byteorder = { version = "1.0", default-features = false }
+byteorder = { version = "=1.4.3", default-features = false }
 crc = { version = "1.7", default-features = false }
 board_misoc = { path = "../libboard_misoc", features = ["uart_console", "smoltcp"] }
 smoltcp = { version = "0.6.0", default-features = false, features = ["ethernet", "proto-ipv4", "proto-ipv6", "socket-tcp"] }
 riscv = { version = "0.6.0", features = ["inline-asm"] }
+
+# insanity required by using cargo build-std over xbuild with nix
+[dev-dependencies]
+getopts = "=0.2.21"
+libc = "=0.2.79"
+unicode-width = "=0.1.8"
+addr2line = "=0.14.0"
+memchr = "=2.3.4"
+hashbrown = "=0.9.0"
+miniz_oxide = "=0.4.0"
+rustc-demangle = "=0.1.18"
+hermit-abi = "=0.1.17"
+dlmalloc = "=0.2.1"
+wasi = "=0.9.0"
+fortanix-sgx-abi = "=0.3.3"
+cc = "=1.0.60"
+compiler_builtins = "=0.1.39"
\ No newline at end of file
diff --git a/artiq/firmware/bootloader/Makefile b/artiq/firmware/bootloader/Makefile
index 82baef3eb..032f6df8c 100644
--- a/artiq/firmware/bootloader/Makefile
+++ b/artiq/firmware/bootloader/Makefile
@@ -3,8 +3,6 @@ include $(MISOC_DIRECTORY)/software/common.mak
 
 RUSTFLAGS += -Cpanic=abort
 
-export XBUILD_SYSROOT_PATH=$(BUILDINC_DIRECTORY)/../sysroot
-
 all:: bootloader.bin
 
 .PHONY: $(RUSTOUT)/libbootloader.a
diff --git a/artiq/firmware/ksupport/Makefile b/artiq/firmware/ksupport/Makefile
index 7a7e26d85..ff73b4b65 100644
--- a/artiq/firmware/ksupport/Makefile
+++ b/artiq/firmware/ksupport/Makefile
@@ -14,8 +14,6 @@ LDFLAGS += --eh-frame-hdr \
 
 RUSTFLAGS += -Cpanic=unwind
 
-export XBUILD_SYSROOT_PATH=$(BUILDINC_DIRECTORY)/../sysroot
-
 all:: ksupport.elf
 
 .PHONY: $(RUSTOUT)/libksupport.a
diff --git a/artiq/firmware/libboard_misoc/lib.rs b/artiq/firmware/libboard_misoc/lib.rs
index 3189ccfcd..70ccaec4b 100644
--- a/artiq/firmware/libboard_misoc/lib.rs
+++ b/artiq/firmware/libboard_misoc/lib.rs
@@ -1,5 +1,6 @@
 #![no_std]
 #![feature(llvm_asm)]
+#![feature(asm)]
 
 extern crate byteorder;
 #[cfg(feature = "log")]
diff --git a/artiq/firmware/libeh/Cargo.toml b/artiq/firmware/libeh/Cargo.toml
index 6998fcd35..3d6837df0 100644
--- a/artiq/firmware/libeh/Cargo.toml
+++ b/artiq/firmware/libeh/Cargo.toml
@@ -10,5 +10,4 @@ path = "lib.rs"
 [dependencies]
 cslice = { version = "0.3" }
 libc = { path = "../libc" }
-unwind = { path = "../libunwind" }
-compiler_builtins = "=0.1.39"    # A dependency of alloc, libeh doesn't need it
+unwind = { path = "../libunwind" }
\ No newline at end of file
diff --git a/artiq/firmware/runtime/Cargo.toml b/artiq/firmware/runtime/Cargo.toml
index ee987ad2d..abd03d554 100644
--- a/artiq/firmware/runtime/Cargo.toml
+++ b/artiq/firmware/runtime/Cargo.toml
@@ -17,7 +17,7 @@ failure = { version = "0.1", default-features = false }
 failure_derive = { version = "0.1", default-features = false }
 byteorder = { version = "1.0", default-features = false }
 cslice = { version = "0.3" }
-log = { version = "0.4", default-features = false }
+log = { version = "=0.4.14", default-features = false }
 managed = { version = "^0.7.1", default-features = false, features = ["alloc", "map"] }
 eh = { path = "../libeh" }
 unwind_backtrace = { path = "../libunwind_backtrace" }
diff --git a/artiq/firmware/runtime/Makefile b/artiq/firmware/runtime/Makefile
index 0427d763f..f7914e85d 100644
--- a/artiq/firmware/runtime/Makefile
+++ b/artiq/firmware/runtime/Makefile
@@ -10,8 +10,6 @@ LDFLAGS += \
 
 RUSTFLAGS += -Cpanic=unwind
 
-export XBUILD_SYSROOT_PATH=$(BUILDINC_DIRECTORY)/../sysroot
-
 all:: runtime.bin runtime.fbi
 
 .PHONY: $(RUSTOUT)/libruntime.a
diff --git a/artiq/firmware/satman/Makefile b/artiq/firmware/satman/Makefile
index 82e65d730..41f1f961a 100644
--- a/artiq/firmware/satman/Makefile
+++ b/artiq/firmware/satman/Makefile
@@ -5,8 +5,6 @@ LDFLAGS += -L../libbase
 
 RUSTFLAGS += -Cpanic=abort
 
-export XBUILD_SYSROOT_PATH=$(BUILDINC_DIRECTORY)/../sysroot
-
 all:: satman.bin satman.fbi
 
 .PHONY: $(RUSTOUT)/libsatman.a
diff --git a/flake.lock b/flake.lock
index 8775bef88..c9da2801f 100644
--- a/flake.lock
+++ b/flake.lock
@@ -11,11 +11,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1664405593,
-        "narHash": "sha256-yP441NerlLGig7n+9xHsx8yCtZ+Ggd0VqfBSzc20E04=",
+        "lastModified": 1717637438,
+        "narHash": "sha256-BXFidNm3Em8iChPGu1L0s2bY+f2yQ0VVid4MuOoTehw=",
         "owner": "m-labs",
         "repo": "artiq-comtools",
-        "rev": "15ddac62813ef623a076ccf982b3bc63d314e651",
+        "rev": "78d27026efe76a13f7b4698a554f55811369ec4d",
         "type": "github"
       },
       "original": {
@@ -25,12 +25,15 @@
       }
     },
     "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
       "locked": {
-        "lastModified": 1659877975,
-        "narHash": "sha256-zllb8aq3YO3h8B/U0/J1WBgAL8EX5yWf5pMj3G0NAmc=",
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "c0e246b9b83f637f4681389ecabcb2681b4f3af0",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
         "type": "github"
       },
       "original": {
@@ -42,11 +45,11 @@
     "mozilla-overlay": {
       "flake": false,
       "locked": {
-        "lastModified": 1687771476,
-        "narHash": "sha256-TSpqz6qYVRoqkEdOCawEQ4/cWt/4pracmvw17HK1tgE=",
+        "lastModified": 1704373101,
+        "narHash": "sha256-+gi59LRWRQmwROrmE1E2b3mtocwueCQqZ60CwLG+gbg=",
         "owner": "mozilla",
         "repo": "nixpkgs-mozilla",
-        "rev": "3a44b8783514e7d6db4b63df96071b6c2b014b07",
+        "rev": "9b11a87c0cc54e308fa83aac5b4ee1816d5418a2",
         "type": "github"
       },
       "original": {
@@ -89,11 +92,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1685540542,
-        "narHash": "sha256-wQJwL3xc6QVQbiJrt71/Z9tp4Eq1yqdGddcEiv7sPCw=",
+        "lastModified": 1717637367,
+        "narHash": "sha256-4mSm9wl5EMgzzrW6w86IDUevkEOT99FESHGcxcyQbD0=",
         "owner": "m-labs",
         "repo": "sipyco",
-        "rev": "f5bf2ba875340a31a135aea14ad184575ca800ac",
+        "rev": "02b96ec2473a3c3d3c980899de2564ddce949dab",
         "type": "github"
       },
       "original": {
@@ -105,11 +108,11 @@
     "src-migen": {
       "flake": false,
       "locked": {
-        "lastModified": 1674045327,
-        "narHash": "sha256-oYdeY0MbTReKbAwmSznnqw0wNawdInJoFJVWW3tesFA=",
+        "lastModified": 1715484909,
+        "narHash": "sha256-4DCHBUBfc/VA+7NW2Hr0+JP4NnKPru2uVJyZjCCk0Ws=",
         "owner": "m-labs",
         "repo": "migen",
-        "rev": "ccaee68e14d3636e1d8fb2e0864dd89b1b1f7384",
+        "rev": "4790bb577681a8c3a8d226bc196a4e5deb39e4df",
         "type": "github"
       },
       "original": {
@@ -121,11 +124,11 @@
     "src-misoc": {
       "flake": false,
       "locked": {
-        "lastModified": 1685415268,
-        "narHash": "sha256-g4+yeSV+HtWjcllM5wk4vNBUVCXtDOzUSKhxXPT7Fyc=",
+        "lastModified": 1715647536,
+        "narHash": "sha256-q+USDcaKHABwW56Jzq8u94iGPWlyLXMyVt0j/Gyg+IE=",
         "ref": "refs/heads/master",
-        "rev": "6d48ce77b6746d3226a682790fbc95b90340986e",
-        "revCount": 2440,
+        "rev": "fea9de558c730bc394a5936094ae95bb9d6fa726",
+        "revCount": 2455,
         "submodules": true,
         "type": "git",
         "url": "https://github.com/m-labs/misoc.git"
@@ -151,6 +154,21 @@
         "repo": "pythonparser",
         "type": "github"
       }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
     }
   },
   "root": "root",
diff --git a/flake.nix b/flake.nix
index a7dbd915f..047d6ffd9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -156,6 +156,7 @@
       migen = pkgs.python3Packages.buildPythonPackage rec {
         name = "migen";
         src = src-migen;
+        format = "pyproject";
         propagatedBuildInputs = [ pkgs.python3Packages.colorama ];
       };
 
@@ -202,20 +203,6 @@
         propagatedBuildInputs = with pkgs.python3Packages; [ pyserial prettytable msgpack migen ];
       };
 
-      cargo-xbuild = rustPlatform.buildRustPackage rec {
-        pname = "cargo-xbuild";
-        version = "0.6.5";
-
-        src = pkgs.fetchFromGitHub {
-          owner = "rust-osdev";
-          repo = pname;
-          rev = "v${version}";
-          sha256 = "18djvygq9v8rmfchvi2hfj0i6fhn36m716vqndqnj56fiqviwxvf";
-        };
-
-        cargoSha256 = "13sj9j9kl6js75h9xq0yidxy63vixxm9q3f8jil6ymarml5wkhx8";
-      };
-
       vivadoEnv = pkgs.buildFHSUserEnv {
         name = "vivado-env";
         targetPkgs = vivadoDeps;
@@ -247,7 +234,6 @@
             pkgs.lld_11
             vivado
             rustPlatform.cargoSetupHook
-            cargo-xbuild
           ];
           buildPhase = 
             ''
@@ -403,7 +389,6 @@
           (pkgs.python3.withPackages(ps: with packages.x86_64-linux; [ migen misoc jesd204b artiq ps.paramiko ps.jsonschema microscope ]))
           rustPlatform.rust.rustc
           rustPlatform.rust.cargo
-          cargo-xbuild
           pkgs.llvmPackages_11.clang-unwrapped
           pkgs.llvm_11
           pkgs.lld_11