diff --git a/third_party/xfsprogs/xfsprogs.bzl b/third_party/xfsprogs/xfsprogs.bzl
new file mode 100644
index 0000000..7265e9f
--- /dev/null
+++ b/third_party/xfsprogs/xfsprogs.bzl
@@ -0,0 +1,212 @@
+#  Copyright 2020 The Monogon Project Authors.
+#
+#  SPDX-License-Identifier: Apache-2.0
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library")
+load("@dev_source_monogon//build/utils:template_file.bzl", "template_file")
+
+defs = [
+    "NDEBUG",  # Doesn't compile without it because their assertions reference non-existent fields
+    "_GNU_SOURCE",
+    "ENABLE_BLKID",
+    "HAVE_FSETXATTR",
+    "HAVE_GETFSMAP",
+    "HAVE_GETMNTENT",
+    "HAVE_MNTENT",
+    "VERSION=\\\"0.0.0\\\"",
+]
+
+template_file(
+    name = "platform_defs.h",
+    src = "include/platform_defs.h.in",
+    substitutions = {
+        "#undef SIZEOF_LONG": "#define SIZEOF_LONG sizeof(long)",  # Because C reasons
+    },
+)
+
+cc_library(
+    name = "util",
+    srcs = [
+        "libfrog/util.c",
+        ":platform_defs.h",
+    ],
+    hdrs = ["libfrog/util.h"],
+    local_defines = defs,
+)
+
+cc_library(
+    name = "radix_tree",
+    srcs = [
+        "libfrog/radix-tree.c",
+        ":platform_defs.h",
+    ],
+    hdrs = ["libfrog/radix-tree.h"],
+    local_defines = defs,
+)
+
+cc_binary(
+    name = "gen_crc32table",
+    srcs = [
+        "libfrog/crc32defs.h",
+        "libfrog/gen_crc32table.c",
+    ],
+)
+
+genrule(
+    name = "crc32table",
+    srcs = [],
+    outs = ["crc32table.h"],
+    cmd = "./$(location :gen_crc32table) > \"$@\"",
+    tools = [":gen_crc32table"],
+)
+
+cc_library(
+    name = "crc32c",
+    srcs = [
+        "include/xfs_arch.h",
+        "libfrog/crc32.c",
+        "libfrog/crc32defs.h",
+        ":crc32table",
+        ":platform_defs.h",
+    ],
+    hdrs = ["libfrog/crc32c.h"],
+    local_defines = defs,
+)
+
+cc_library(
+    name = "list_sort",
+    srcs = ["libfrog/list_sort.c"],
+    hdrs = ["include/list.h"],
+    local_defines = defs,
+)
+
+cc_library(
+    name = "fsgeom",
+    srcs = ["libfrog/fsgeom.c"],
+    hdrs = ["libfrog/fsgeom.h"],
+    local_defines = defs,
+    deps = [
+        ":libxfs",
+        ":util",
+    ],
+)
+
+cc_library(
+    name = "projects",
+    srcs = [
+        "include/input.h",
+        "libfrog/projects.c",
+        "libfrog/projects.h",
+        ":platform_defs.h",
+    ],
+    hdrs = ["libfrog/projects.h"],
+    local_defines = defs,
+    deps = [
+        ":libxfs",
+    ],
+)
+
+cc_library(
+    name = "convert",
+    srcs = [
+        "include/input.h",
+        "libfrog/convert.c",
+        ":platform_defs.h",
+    ],
+    hdrs = ["libfrog/convert.h"],
+    local_defines = defs,
+    deps = [
+        ":projects",
+    ],
+)
+
+cc_library(
+    name = "topology",
+    srcs = [
+        "include/xfs_multidisk.h",
+        "libfrog/topology.c",
+    ],
+    hdrs = [
+        "include/libxcmd.h",
+        "libfrog/topology.h",
+    ],
+    local_defines = defs,
+    visibility = ["//visibility:public"],
+    deps = [
+        ":libxfs",
+        "@util_linux//:blkid",
+    ],
+)
+
+cc_library(
+    name = "platform",
+    srcs = ["libfrog/linux.c"],
+    local_defines = defs,
+    visibility = ["//visibility:public"],
+    deps = [":libxfs"],
+)
+
+cc_library(
+    name = "libxfs",
+    srcs = glob([
+        "libxfs/*.c",
+        "libxfs/*.h",
+    ]) + [
+        ":platform_defs.h",
+        "include/xfs.h",
+        "libfrog/platform.h",
+        "include/linux.h",
+        "include/hlist.h",
+        "include/cache.h",
+        "include/bitops.h",
+        "include/kmem.h",
+        "include/atomic.h",
+        "include/xfs_mount.h",
+        "include/xfs_inode.h",
+        "include/xfs_trans.h",
+        "include/xfs_trace.h",
+        "libfrog/linux.c",
+        "include/xfs_fs_compat.h",
+    ],
+    hdrs = ["include/libxfs.h"],
+    local_defines = defs,
+    deps = [
+        ":crc32c",
+        ":list_sort",
+        ":radix_tree",
+        "@util_linux//:uuid",
+    ],
+)
+
+cc_binary(
+    name = "mkfs",
+    srcs = [
+        "include/xfs_multidisk.h",
+        "mkfs/proto.c",
+        "mkfs/xfs_mkfs.c",
+    ],
+    linkopts = ["-lpthread"],
+    local_defines = defs,
+    deps = [
+        ":convert",
+        ":fsgeom",
+        ":libxfs",
+        ":platform",
+        ":topology",
+        ":util",
+        "@inih",
+    ],
+    visibility = ["//visibility:public"],
+)