diff --git a/ic-os/defs.bzl b/ic-os/defs.bzl
index ab84e9f39b8..73f1caceefa 100644
--- a/ic-os/defs.bzl
+++ b/ic-os/defs.bzl
@@ -201,7 +201,7 @@ def icos_build(
             testonly = malicious,
             srcs = ["partition-root-unsigned.tzst"],
             outs = ["partition-root.tzst", "partition-root-hash"],
-            cmd = "$(location //toolchains/sysimage:verity_sign.py) -i $< -o $(location :partition-root.tzst) -r $(location partition-root-hash) -d $(location //rs/ic_os/dflate)",
+            cmd = "$(location //toolchains/sysimage:verity_sign.py) -i $< -o $(location :partition-root.tzst) -r $(location partition-root-hash) --dflate $(location //rs/ic_os/dflate)",
             executable = False,
             tools = ["//toolchains/sysimage:verity_sign.py", "//rs/ic_os/dflate"],
             tags = ["manual"],
@@ -224,7 +224,7 @@ def icos_build(
                 testonly = malicious,
                 srcs = ["partition-root-test-unsigned.tzst"],
                 outs = ["partition-root-test.tzst", "partition-root-test-hash"],
-                cmd = "$(location //toolchains/sysimage:verity_sign.py) -i $< -o $(location :partition-root-test.tzst) -r $(location partition-root-test-hash) -d $(location //rs/ic_os/dflate)",
+                cmd = "$(location //toolchains/sysimage:verity_sign.py) -i $< -o $(location :partition-root-test.tzst) -r $(location partition-root-test-hash) --dflate $(location //rs/ic_os/dflate)",
                 tools = ["//toolchains/sysimage:verity_sign.py", "//rs/ic_os/dflate"],
                 tags = ["manual"],
             )
@@ -784,7 +784,7 @@ EOF
         name = "partition-root-sign",
         srcs = ["partition-root-unsigned.tzst"],
         outs = ["partition-root.tzst", "partition-root-hash"],
-        cmd = "$(location //toolchains/sysimage:verity_sign.py) -i $< -o $(location :partition-root.tzst) -r $(location partition-root-hash) -d $(location //rs/ic_os/dflate)",
+        cmd = "$(location //toolchains/sysimage:verity_sign.py) -i $< -o $(location :partition-root.tzst) -r $(location partition-root-hash) --dflate $(location //rs/ic_os/dflate)",
         executable = False,
         tools = ["//toolchains/sysimage:verity_sign.py", "//rs/ic_os/dflate"],
         tags = ["manual"],
diff --git a/rs/ic_os/inject_files/src/main.rs b/rs/ic_os/inject_files/src/main.rs
index d409d7dc36c..56b83a81329 100644
--- a/rs/ic_os/inject_files/src/main.rs
+++ b/rs/ic_os/inject_files/src/main.rs
@@ -22,7 +22,7 @@ struct Cli {
     file_contexts: Option<PathBuf>,
     #[arg(long)]
     prefix: Option<PathBuf>,
-    #[arg(short)]
+    #[arg(long)]
     dflate: PathBuf,
     extra_files: Vec<String>,
 }
@@ -89,6 +89,7 @@ async fn main() -> Result<()> {
     target.close().await?;
 
     // TODO: Quick hack to unpack and repack file
+    // We use our tool, dflate, to quickly create a sparse, deterministic, tar.
     // If dflate is ever misbehaving, it can be replaced with:
     // tar cf <output> --sort=name --owner=root:0 --group=root:0 --mtime="UTC 1970-01-01 00:00:00" --sparse --hole-detection=raw -C <context_path> <item>
     let temp_tar = temp_dir.path().join("partition.tar");
diff --git a/toolchains/sysimage/build_disk_image.py b/toolchains/sysimage/build_disk_image.py
index db9eb843361..61e4ed8d790 100755
--- a/toolchains/sysimage/build_disk_image.py
+++ b/toolchains/sysimage/build_disk_image.py
@@ -145,7 +145,7 @@ def main():
         nargs="*",
         help="Partitions to write. These must match the CSV partition table entries.",
     )
-    parser.add_argument("-d", "--dflate", help="Path to dflate", type=str)
+    parser.add_argument("--dflate", help="Path to our dflate tool", type=str)
 
     args = parser.parse_args(sys.argv[1:])
 
@@ -187,6 +187,7 @@ def main():
     if args.expanded_size:
         subprocess.run(["truncate", "--size", args.expanded_size, disk_image], check=True)
 
+    # We use our tool, dflate, to quickly create a sparse, deterministic, tar.
     # If dflate is ever misbehaving, it can be replaced with:
     # tar cf <output> --sort=name --owner=root:0 --group=root:0 --mtime="UTC 1970-01-01 00:00:00" --sparse --hole-detection=raw -C <context_path> <item>
     subprocess.run(
diff --git a/toolchains/sysimage/build_ext4_image.py b/toolchains/sysimage/build_ext4_image.py
index 356490efecd..9e42e2452dc 100755
--- a/toolchains/sysimage/build_ext4_image.py
+++ b/toolchains/sysimage/build_ext4_image.py
@@ -158,7 +158,7 @@ def make_argparser():
         default=[],
         help="Directories to be cleared from the tree; expects a list of full paths",
     )
-    parser.add_argument("-d", "--dflate", help="Path to dflate tool", type=str, required=True)
+    parser.add_argument("--dflate", help="Path to our dflate tool", type=str, required=True)
     parser.add_argument("--diroid", help="Path to our diroid tool", type=str, required=True)
     return parser
 
@@ -220,6 +220,7 @@ def main():
 
     subprocess.run(['sync'], check=True)
 
+    # We use our tool, dflate, to quickly create a sparse, deterministic, tar.
     # If dflate is ever misbehaving, it can be replaced with:
     # tar cf <output> --sort=name --owner=root:0 --group=root:0 --mtime="UTC 1970-01-01 00:00:00" --sparse --hole-detection=raw -C <context_path> <item>
     temp_tar = os.path.join(tmpdir, "partition.tar")
diff --git a/toolchains/sysimage/build_fat32_image.py b/toolchains/sysimage/build_fat32_image.py
index 3eca69f95d2..d4dbf0dc2e3 100755
--- a/toolchains/sysimage/build_fat32_image.py
+++ b/toolchains/sysimage/build_fat32_image.py
@@ -105,7 +105,7 @@ def main():
         nargs="*",
         help="Extra files to install; expects list of sourcefile:targetfile:mode",
     )
-    parser.add_argument("-d", "--dflate", help="Path to dflate", type=str)
+    parser.add_argument("--dflate", help="Path to our dflate tool", type=str)
 
     args = parser.parse_args(sys.argv[1:])
 
@@ -142,6 +142,7 @@ def path_transform(path, limit_prefix=limit_prefix):
 
     install_extra_files(image_file, extra_files, path_transform)
 
+    # We use our tool, dflate, to quickly create a sparse, deterministic, tar.
     # If dflate is ever misbehaving, it can be replaced with:
     # tar cf <output> --sort=name --owner=root:0 --group=root:0 --mtime="UTC 1970-01-01 00:00:00" --sparse --hole-detection=raw -C <context_path> <item>
     temp_tar = os.path.join(tmpdir, "partition.tar")
diff --git a/toolchains/sysimage/build_lvm_image.py b/toolchains/sysimage/build_lvm_image.py
index 2dc4a47c416..aee49c0dfd7 100755
--- a/toolchains/sysimage/build_lvm_image.py
+++ b/toolchains/sysimage/build_lvm_image.py
@@ -37,7 +37,7 @@ def main():
         nargs="*",
         help="Partitions to write. These must match the CSV volume table entries.",
     )
-    parser.add_argument("-d", "--dflate", help="Path to dflate", type=str)
+    parser.add_argument("--dflate", help="Path to our dflate tool", type=str)
 
     args = parser.parse_args(sys.argv[1:])
 
@@ -78,6 +78,7 @@ def main():
         else:
             print("No partition file for '%s' found, leaving empty" % name)
 
+    # We use our tool, dflate, to quickly create a sparse, deterministic, tar.
     # If dflate is ever misbehaving, it can be replaced with:
     # tar cf <output> --sort=name --owner=root:0 --group=root:0 --mtime="UTC 1970-01-01 00:00:00" --sparse --hole-detection=raw -C <context_path> <item>
     temp_tar = os.path.join(tmpdir, "partition.tar")
diff --git a/toolchains/sysimage/build_upgrade_image.py b/toolchains/sysimage/build_upgrade_image.py
index acd91998665..e1fceca588a 100755
--- a/toolchains/sysimage/build_upgrade_image.py
+++ b/toolchains/sysimage/build_upgrade_image.py
@@ -20,7 +20,7 @@ def main():
     parser.add_argument("-b", "--boot", help="The (tzst) boot filesystem image", type=str)
     parser.add_argument("-r", "--root", help="The (tzst) root filesystem image", type=str)
     parser.add_argument("-v", "--versionfile", help="The version file in the upgrade image", type=str)
-    parser.add_argument("-d", "--dflate", help="Path to dflate", type=str)
+    parser.add_argument("--dflate", help="Path to our dflate tool", type=str)
 
     args = parser.parse_args(sys.argv[1:])
 
@@ -41,6 +41,7 @@ def main():
     version_path = os.path.join(tmpdir, "VERSION.TXT")
     shutil.copy(version_file, version_path, follow_symlinks=True)
 
+    # We use our tool, dflate, to quickly create a sparse, deterministic, tar.
     # If dflate is ever misbehaving, it can be replaced with:
     # tar cf <output> --sort=name --owner=root:0 --group=root:0 --mtime="UTC 1970-01-01 00:00:00" --sparse --hole-detection=raw -C <context_path> <item>
     subprocess.run(
diff --git a/toolchains/sysimage/build_vfat_image.py b/toolchains/sysimage/build_vfat_image.py
index 9ca70dd6609..5bad52ec19e 100755
--- a/toolchains/sysimage/build_vfat_image.py
+++ b/toolchains/sysimage/build_vfat_image.py
@@ -104,7 +104,7 @@ def main():
         nargs="*",
         help="Extra files to install; expects list of sourcefile:targetfile:mode",
     )
-    parser.add_argument("-d", "--dflate", help="Path to dflate", type=str)
+    parser.add_argument("--dflate", help="Path to our dflate tool", type=str)
 
     args = parser.parse_args(sys.argv[1:])
 
@@ -138,6 +138,7 @@ def path_transform(path, limit_prefix=limit_prefix):
 
     install_extra_files(image_file, extra_files, path_transform)
 
+    # We use our tool, dflate, to quickly create a sparse, deterministic, tar.
     # If dflate is ever misbehaving, it can be replaced with:
     # tar cf <output> --sort=name --owner=root:0 --group=root:0 --mtime="UTC 1970-01-01 00:00:00" --sparse --hole-detection=raw -C <context_path> <item>
     temp_tar = os.path.join(tmpdir, "partition.tar")
diff --git a/toolchains/sysimage/toolchain.bzl b/toolchains/sysimage/toolchain.bzl
index 3d3a689c346..80509fc5218 100644
--- a/toolchains/sysimage/toolchain.bzl
+++ b/toolchains/sysimage/toolchain.bzl
@@ -162,7 +162,7 @@ def _vfat_image_impl(ctx):
         ctx.attr.partition_size,
         "-p",
         ctx.attr.subdir,
-        "-d",
+        "--dflate",
         dflate.path,
     ]
 
@@ -226,7 +226,7 @@ def _fat32_image_impl(ctx):
         ctx.attr.partition_size,
         "-p",
         ctx.attr.subdir,
-        "-d",
+        "--dflate",
         dflate.path,
     ]
 
@@ -297,7 +297,7 @@ def _ext4_image_impl(ctx):
         ctx.attr.subdir,
         "--diroid",
         diroid.path,
-        "-d",
+        "--dflate",
         dflate.path,
     ]
     if len(ctx.files.file_contexts) > 0:
@@ -362,7 +362,7 @@ def _inject_files_impl(ctx):
         ctx.files.base[0].path,
         "--output",
         out.path,
-        "-d",
+        "--dflate",
         dflate.path,
     ]
 
@@ -429,7 +429,7 @@ def _disk_image_impl(ctx):
     for p in partitions:
         partition_files.append(p.path)
 
-    args = ["-p", in_layout.path, "-o", out.path, "-d", dflate.path]
+    args = ["-p", in_layout.path, "-o", out.path, "--dflate", dflate.path]
 
     if expanded_size:
         args += ["-s", expanded_size]
@@ -483,7 +483,7 @@ def _lvm_image_impl(ctx):
     for p in partitions:
         partition_files.append(p.path)
 
-    args = ["-v", in_layout.path, "-n", vg_name, "-u", vg_uuid, "-p", pv_uuid, "-o", out.path, "-d", dflate.path]
+    args = ["-v", in_layout.path, "-n", vg_name, "-u", vg_uuid, "-p", pv_uuid, "-o", out.path, "--dflate", dflate.path]
 
     args += partition_files
 
@@ -533,7 +533,7 @@ def _upgrade_image_impl(ctx):
     ctx.actions.run_shell(
         inputs = [in_boot_partition, in_root_partition, in_version_file],
         outputs = [out],
-        command = "python3 %s -b %s -r %s -v %s -o %s -d %s" % (
+        command = "python3 %s -b %s -r %s -v %s -o %s --dflate %s" % (
             tool_file.path,
             in_boot_partition.path,
             in_root_partition.path,
diff --git a/toolchains/sysimage/verity_sign.py b/toolchains/sysimage/verity_sign.py
index 0e3edfff0ff..7dba6a4b31b 100755
--- a/toolchains/sysimage/verity_sign.py
+++ b/toolchains/sysimage/verity_sign.py
@@ -36,7 +36,7 @@ def main():
         type=int,
         default=10 * 1024 * 1024 * 1024 - 128 * 1024 * 1024,
     )
-    parser.add_argument("-d", "--dflate", help="Path to dflate", type=str)
+    parser.add_argument("--dflate", help="Path to our dflate tool", type=str)
 
     args = parser.parse_args(sys.argv[1:])
 
@@ -88,6 +88,7 @@ def main():
     with open(args.root_hash, "w") as f:
         f.write(root_hash + "\n")
 
+    # We use our tool, dflate, to quickly create a sparse, deterministic, tar.
     # If dflate is ever misbehaving, it can be replaced with:
     # tar cf <output> --sort=name --owner=root:0 --group=root:0 --mtime="UTC 1970-01-01 00:00:00" --sparse --hole-detection=raw -C <context_path> <item>
     temp_tar = os.path.join(tmpdir, "partition.tar")