diff --git a/Cargo.lock b/Cargo.lock
index 4d5600c..9fa7a11 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -102,6 +102,39 @@ dependencies = [
  "zstd-safe",
 ]
 
+[[package]]
+name = "async-stream"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b5a71a6f37880a80d1d7f19efd781e4b5de42c88f0722cc13bcb6cc2cfe8476"
+dependencies = [
+ "async-stream-impl",
+ "futures-core",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "async-stream-impl"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c7c24de15d275a1ecfd47a380fb4d5ec9bfe0933f309ed5e705b775596a3574d"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "async-trait"
+version = "0.1.88"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e539d3fca749fcee5236ab05e93a52867dd549cc157c8cb7f99595f3cedffdb5"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "atomic-waker"
 version = "1.1.2"
@@ -429,7 +462,7 @@ dependencies = [
  "rustls-native-certs 0.8.1",
  "rustls-pki-types",
  "tokio",
- "tower",
+ "tower 0.5.2",
  "tracing",
 ]
 
@@ -553,6 +586,53 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "axum"
+version = "0.7.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "edca88bc138befd0323b20752846e6587272d3b03b0343c8ea28a6f819e6e71f"
+dependencies = [
+ "async-trait",
+ "axum-core",
+ "bytes",
+ "futures-util",
+ "http 1.3.1",
+ "http-body 1.0.1",
+ "http-body-util",
+ "itoa",
+ "matchit",
+ "memchr",
+ "mime",
+ "percent-encoding",
+ "pin-project-lite",
+ "rustversion",
+ "serde",
+ "sync_wrapper",
+ "tower 0.5.2",
+ "tower-layer",
+ "tower-service",
+]
+
+[[package]]
+name = "axum-core"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09f2bd6146b97ae3359fa0cc6d6b376d9539582c7b4220f041a33ec24c226199"
+dependencies = [
+ "async-trait",
+ "bytes",
+ "futures-util",
+ "http 1.3.1",
+ "http-body 1.0.1",
+ "http-body-util",
+ "mime",
+ "pin-project-lite",
+ "rustversion",
+ "sync_wrapper",
+ "tower-layer",
+ "tower-service",
+]
+
 [[package]]
 name = "backtrace"
 version = "0.3.74"
@@ -657,6 +737,12 @@ version = "3.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1628fb46dfa0b37568d12e5edd512553eccf6a22a78e8bde00bb4aed84d5bdbf"
 
+[[package]]
+name = "byteorder"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
+
 [[package]]
 name = "bytes"
 version = "1.10.1"
@@ -776,6 +862,45 @@ version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5b63caa9aa9397e2d9480a9b13673856c78d8ac123288526c37d7839f2a86990"
 
+[[package]]
+name = "console-api"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8030735ecb0d128428b64cd379809817e620a40e5001c54465b99ec5feec2857"
+dependencies = [
+ "futures-core",
+ "prost",
+ "prost-types",
+ "tonic",
+ "tracing-core",
+]
+
+[[package]]
+name = "console-subscriber"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6539aa9c6a4cd31f4b1c040f860a1eac9aa80e7df6b05d506a6e7179936d6a01"
+dependencies = [
+ "console-api",
+ "crossbeam-channel",
+ "crossbeam-utils",
+ "futures-task",
+ "hdrhistogram",
+ "humantime",
+ "hyper-util",
+ "prost",
+ "prost-types",
+ "serde",
+ "serde_json",
+ "thread_local",
+ "tokio",
+ "tokio-stream",
+ "tonic",
+ "tracing",
+ "tracing-core",
+ "tracing-subscriber",
+]
+
 [[package]]
 name = "const-oid"
 version = "0.9.6"
@@ -859,6 +984,21 @@ dependencies = [
  "crc",
 ]
 
+[[package]]
+name = "crossbeam-channel"
+version = "0.5.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "82b8f8f868b36967f9606790d1903570de9ceaf870a7bf9fbbd3016d636a2cb2"
+dependencies = [
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-utils"
+version = "0.8.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d0a5c400df2834b80a4c3327b3aad3a4c4cd4de0629063962b03235697506a28"
+
 [[package]]
 name = "crypto-bigint"
 version = "0.4.9"
@@ -1160,6 +1300,16 @@ version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "28dea519a9695b9977216879a3ebfddf92f1c08c05d984f8996aecd6ecdc811d"
 
+[[package]]
+name = "flate2"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ced92e76e966ca2fd84c8f7aa01a4aea65b0eb6648d72f7c8f3e2764a67fece"
+dependencies = [
+ "crc32fast",
+ "miniz_oxide",
+]
+
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -1359,7 +1509,7 @@ dependencies = [
  "futures-sink",
  "futures-util",
  "http 0.2.12",
- "indexmap",
+ "indexmap 2.9.0",
  "slab",
  "tokio",
  "tokio-util",
@@ -1378,13 +1528,19 @@ dependencies = [
  "futures-core",
  "futures-sink",
  "http 1.3.1",
- "indexmap",
+ "indexmap 2.9.0",
  "slab",
  "tokio",
  "tokio-util",
  "tracing",
 ]
 
+[[package]]
+name = "hashbrown"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
+
 [[package]]
 name = "hashbrown"
 version = "0.15.2"
@@ -1396,6 +1552,19 @@ dependencies = [
  "foldhash",
 ]
 
+[[package]]
+name = "hdrhistogram"
+version = "7.5.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "765c9198f173dd59ce26ff9f95ef0aafd0a0fe01fb9d72841bc5066a4c06511d"
+dependencies = [
+ "base64 0.21.7",
+ "byteorder",
+ "flate2",
+ "nom 7.1.3",
+ "num-traits",
+]
+
 [[package]]
 name = "heck"
 version = "0.5.0"
@@ -1494,6 +1663,12 @@ version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "df3b46402a9d5adb4c86a0cf463f42e19994e3ee891101b1841f30a545cb49a9"
 
+[[package]]
+name = "humantime"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b112acc8b3adf4b107a8ec20977da0273a8c386765a3ec0229bd500a1443f9f"
+
 [[package]]
 name = "hyper"
 version = "0.14.32"
@@ -1531,6 +1706,7 @@ dependencies = [
  "http 1.3.1",
  "http-body 1.0.1",
  "httparse",
+ "httpdate",
  "itoa",
  "pin-project-lite",
  "smallvec",
@@ -1572,6 +1748,19 @@ dependencies = [
  "tower-service",
 ]
 
+[[package]]
+name = "hyper-timeout"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b90d566bffbce6a75bd8b09a05aa8c2cb1fabb6cb348f8840c9e4c90a0d83b0"
+dependencies = [
+ "hyper 1.6.0",
+ "hyper-util",
+ "pin-project-lite",
+ "tokio",
+ "tower-service",
+]
+
 [[package]]
 name = "hyper-tls"
 version = "0.6.0"
@@ -1747,6 +1936,16 @@ dependencies = [
  "icu_properties",
 ]
 
+[[package]]
+name = "indexmap"
+version = "1.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bd070e393353796e801d209ad339e89596eb4c8d430d18ede6a1cced8fafbd99"
+dependencies = [
+ "autocfg",
+ "hashbrown 0.12.3",
+]
+
 [[package]]
 name = "indexmap"
 version = "2.9.0"
@@ -1754,7 +1953,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cea70ddb795996207ad57735b50c5982d8844f38ba9ee5f1aedcfb708a2aa11e"
 dependencies = [
  "equivalent",
- "hashbrown",
+ "hashbrown 0.15.2",
 ]
 
 [[package]]
@@ -1891,7 +2090,7 @@ version = "0.12.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "234cf4f4a04dc1f57e24b96cc0cd600cf2af460d4161ac5ecdd0af8e1f3b2a38"
 dependencies = [
- "hashbrown",
+ "hashbrown 0.15.2",
 ]
 
 [[package]]
@@ -1903,6 +2102,12 @@ dependencies = [
  "regex-automata 0.1.10",
 ]
 
+[[package]]
+name = "matchit"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0e7465ac9959cc2b1404e8e2367b43684a6d13790fe23056cc8c6c5a6b7bcb94"
+
 [[package]]
 name = "md-5"
 version = "0.10.6"
@@ -2024,6 +2229,7 @@ dependencies = [
  "aws-config",
  "aws-sdk-s3",
  "clap",
+ "console-subscriber",
  "cxx",
  "cxx-build",
  "ed25519-dalek",
@@ -2037,7 +2243,6 @@ dependencies = [
  "sha2",
  "tokio",
  "tracing",
- "tracing-subscriber",
  "url",
 ]
 
@@ -2060,16 +2265,6 @@ dependencies = [
  "memchr",
 ]
 
-[[package]]
-name = "nu-ansi-term"
-version = "0.46.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "77a8165726e8236064dbb45459242600304b42a5ea24ee2948e18e023bf7ba84"
-dependencies = [
- "overload",
- "winapi",
-]
-
 [[package]]
 name = "num-conv"
 version = "0.1.0"
@@ -2180,12 +2375,6 @@ version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1a80800c0488c3a21695ea981a54918fbb37abf04f4d0720c453632255e2ff0e"
 
-[[package]]
-name = "overload"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b15813163c1d831bf4a13c3610c05c0d03b39feb07f7e09fa234dac9b15aaf39"
-
 [[package]]
 name = "p256"
 version = "0.11.1"
@@ -2226,6 +2415,26 @@ version = "2.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e3148f5046208a5d56bcfc03053e3ca6334e51da8dfb19b6cdc8b306fae3283e"
 
+[[package]]
+name = "pin-project"
+version = "1.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "677f1add503faace112b9f1373e43e9e054bfdd22ff1a63c1bc485eaec6a6a8a"
+dependencies = [
+ "pin-project-internal",
+]
+
+[[package]]
+name = "pin-project-internal"
+version = "1.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e918e4ff8c4549eb882f14b3a4bc8c8bc93de829416eacf579f1207a8fbf861"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "pin-project-lite"
 version = "0.2.16"
@@ -2270,6 +2479,15 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "439ee305def115ba05938db6eb1644ff94165c5ab5e9420d1c1bcedbba909391"
 
+[[package]]
+name = "ppv-lite86"
+version = "0.2.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85eae3c4ed2f50dcfe72643da4befc30deadb458a9b590d720cde2f2b1e97da9"
+dependencies = [
+ "zerocopy",
+]
+
 [[package]]
 name = "prettyplease"
 version = "0.2.32"
@@ -2298,6 +2516,38 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "prost"
+version = "0.13.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2796faa41db3ec313a31f7624d9286acf277b52de526150b7e69f3debf891ee5"
+dependencies = [
+ "bytes",
+ "prost-derive",
+]
+
+[[package]]
+name = "prost-derive"
+version = "0.13.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8a56d757972c98b346a9b766e3f02746cde6dd1cd1d1d563472929fdd74bec4d"
+dependencies = [
+ "anyhow",
+ "itertools",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "prost-types"
+version = "0.13.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "52c2c1bf36ddb1a1c396b3601a3cec27c2462e45f07c386894ec3ccf5332bd16"
+dependencies = [
+ "prost",
+]
+
 [[package]]
 name = "quote"
 version = "1.0.40"
@@ -2313,6 +2563,27 @@ version = "5.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "74765f6d916ee2faa39bc8e68e4f3ed8949b48cccdac59983d287a7cb71ce9c5"
 
+[[package]]
+name = "rand"
+version = "0.8.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
+dependencies = [
+ "libc",
+ "rand_chacha",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
+dependencies = [
+ "ppv-lite86",
+ "rand_core",
+]
+
 [[package]]
 name = "rand_core"
 version = "0.6.4"
@@ -2416,7 +2687,7 @@ dependencies = [
  "system-configuration",
  "tokio",
  "tokio-native-tls",
- "tower",
+ "tower 0.5.2",
  "tower-service",
  "url",
  "wasm-bindgen",
@@ -3023,6 +3294,7 @@ dependencies = [
  "signal-hook-registry",
  "socket2",
  "tokio-macros",
+ "tracing",
  "windows-sys 0.52.0",
 ]
 
@@ -3067,6 +3339,17 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "tokio-stream"
+version = "0.1.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eca58d7bba4a75707817a2c44174253f9236b2d5fbd055602e9d5c07c139a047"
+dependencies = [
+ "futures-core",
+ "pin-project-lite",
+ "tokio",
+]
+
 [[package]]
 name = "tokio-util"
 version = "0.7.14"
@@ -3092,11 +3375,61 @@ version = "0.22.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "17b4795ff5edd201c7cd6dca065ae59972ce77d1b80fa0a84d94950ece7d1474"
 dependencies = [
- "indexmap",
+ "indexmap 2.9.0",
  "toml_datetime",
  "winnow",
 ]
 
+[[package]]
+name = "tonic"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "877c5b330756d856ffcc4553ab34a5684481ade925ecc54bcd1bf02b1d0d4d52"
+dependencies = [
+ "async-stream",
+ "async-trait",
+ "axum",
+ "base64 0.22.1",
+ "bytes",
+ "h2 0.4.9",
+ "http 1.3.1",
+ "http-body 1.0.1",
+ "http-body-util",
+ "hyper 1.6.0",
+ "hyper-timeout",
+ "hyper-util",
+ "percent-encoding",
+ "pin-project",
+ "prost",
+ "socket2",
+ "tokio",
+ "tokio-stream",
+ "tower 0.4.13",
+ "tower-layer",
+ "tower-service",
+ "tracing",
+]
+
+[[package]]
+name = "tower"
+version = "0.4.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8fa9be0de6cf49e536ce1851f987bd21a43b771b09473c3549a6c853db37c1c"
+dependencies = [
+ "futures-core",
+ "futures-util",
+ "indexmap 1.9.3",
+ "pin-project",
+ "pin-project-lite",
+ "rand",
+ "slab",
+ "tokio",
+ "tokio-util",
+ "tower-layer",
+ "tower-service",
+ "tracing",
+]
+
 [[package]]
 name = "tower"
 version = "0.5.2"
@@ -3156,17 +3489,6 @@ dependencies = [
  "valuable",
 ]
 
-[[package]]
-name = "tracing-log"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee855f1f400bd0e5c02d150ae5de3840039a3f54b025156404e34c23c03f47c3"
-dependencies = [
- "log",
- "once_cell",
- "tracing-core",
-]
-
 [[package]]
 name = "tracing-subscriber"
 version = "0.3.19"
@@ -3174,15 +3496,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e8189decb5ac0fa7bc8b96b7cb9b2701d60d48805aca84a238004d665fcc4008"
 dependencies = [
  "matchers",
- "nu-ansi-term",
  "once_cell",
  "regex",
  "sharded-slab",
- "smallvec",
  "thread_local",
  "tracing",
  "tracing-core",
- "tracing-log",
 ]
 
 [[package]]
@@ -3398,22 +3717,6 @@ dependencies = [
  "rustix 0.38.44",
 ]
 
-[[package]]
-name = "winapi"
-version = "0.3.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
-dependencies = [
- "winapi-i686-pc-windows-gnu",
- "winapi-x86_64-pc-windows-gnu",
-]
-
-[[package]]
-name = "winapi-i686-pc-windows-gnu"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
-
 [[package]]
 name = "winapi-util"
 version = "0.1.9"
@@ -3423,12 +3726,6 @@ dependencies = [
  "windows-sys 0.59.0",
 ]
 
-[[package]]
-name = "winapi-x86_64-pc-windows-gnu"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
-
 [[package]]
 name = "windows-link"
 version = "0.1.1"
@@ -3670,6 +3967,26 @@ dependencies = [
  "synstructure",
 ]
 
+[[package]]
+name = "zerocopy"
+version = "0.8.24"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2586fea28e186957ef732a5f8b3be2da217d65c5969d4b1e17f973ebbe876879"
+dependencies = [
+ "zerocopy-derive",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.8.24"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a996a8f63c5c4448cd959ac1bab0aaa3306ccfd060472f85943ee0750f0169be"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "zerofrom"
 version = "0.1.6"
diff --git a/Cargo.toml b/Cargo.toml
index 8adf37e..ee646cf 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,11 +17,11 @@ reqwest = "0.12.15"
 serde = { version = "1.0.219", features = [ "derive" ]}
 serde_json = "1.0.140"
 sha2 = "0.10.8"
-tokio = { version = "1.44.1", features = [ "full" ]}
+tokio = { version = "1.44.1", features = [ "full", "tracing", "parking_lot" ]}
 tracing = "0.1.41"
-tracing-subscriber = { version = "0.3.19", features = ["env-filter"]}
 url = { version = "2.5.4", features = [ "serde" ]}
 cxx = "1.0"
+console-subscriber = "0.4.1"
 
 [build-dependencies]
 cxx-build = "1.0"
diff --git a/flake.nix b/flake.nix
index e9165c2..46caa41 100644
--- a/flake.nix
+++ b/flake.nix
@@ -34,8 +34,11 @@
             openssl
             nix
             boost
+            tokio-console
           ];
           NIX_INCLUDE_PATH = "${lib.getDev pkgs.nix}/include";
+          RUST_LOG = "nixcp=debug";
+          RUST_BACKGRACE = 1;
         };
 
         packages.default = craneLib.buildPackage {
diff --git a/src/main.rs b/src/main.rs
index 5a7e91f..f4c0f4f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -5,7 +5,6 @@ use std::path::PathBuf;
 
 use anyhow::{Context, Result};
 use clap::{Args, Parser, Subcommand};
-use tracing_subscriber::{EnvFilter, FmtSubscriber};
 
 use push::Push;
 use store::Store;
@@ -73,9 +72,7 @@ pub struct PushArgs {
 
 #[tokio::main]
 async fn main() -> Result<()> {
-    let filter = EnvFilter::from_default_env();
-    let subscriber = FmtSubscriber::builder().with_env_filter(filter).finish();
-    tracing::subscriber::set_global_default(subscriber)?;
+    console_subscriber::init();
 
     let cli = Cli::parse();
 
diff --git a/src/path_info.rs b/src/path_info.rs
index 3d54b17..e62b68a 100644
--- a/src/path_info.rs
+++ b/src/path_info.rs
@@ -7,6 +7,7 @@ use nix_compat::nixbase32;
 use nix_compat::store_path::StorePath;
 use regex::Regex;
 use std::path::Path;
+use tokio::process::Command;
 use tracing::{debug, trace};
 use url::Url;
 
@@ -22,9 +23,29 @@ pub struct PathInfo {
 impl PathInfo {
     pub async fn from_path(path: &Path, store: &Store) -> Result<Self> {
         debug!("query path info for {:?}", path);
-        let canon = path.canonicalize().context("canonicalize path")?;
-        let store_path = StorePath::from_absolute_path(canon.into_os_string().as_encoded_bytes())?;
-        store.query_path_info(store_path).await
+
+        let derivation = match path.extension() {
+            Some(ext) if ext == "drv" => path.as_os_str().as_encoded_bytes(),
+            _ => {
+                &Command::new("nix")
+                    .arg("path-info")
+                    .arg("--derivation")
+                    .arg(path)
+                    .output()
+                    .await
+                    .context(format!("run command: nix path-info --derivaiton {path:?}"))?
+                    .stdout
+            }
+        };
+        let derivation = String::from_utf8_lossy(derivation);
+        debug!("derivation: {derivation}");
+
+        let store_path = StorePath::from_absolute_path(derivation.trim().as_bytes())
+            .context("storepath from derivation")?;
+        store
+            .query_path_info(store_path)
+            .await
+            .context("query pathinfo for derivation")
     }
 
     pub async fn get_closure(&self, store: &Store) -> Result<Vec<Self>> {
diff --git a/src/push.rs b/src/push.rs
index dca2a9f..8177864 100644
--- a/src/push.rs
+++ b/src/push.rs
@@ -13,8 +13,8 @@ use aws_config::Region;
 use aws_sdk_s3 as s3;
 use futures::future::join_all;
 use nix_compat::narinfo::{self, SigningKey};
-use tokio::sync::{RwLock, Semaphore, mpsc};
-use tracing::{debug, trace};
+use tokio::sync::{RwLock, mpsc};
+use tracing::debug;
 use url::Url;
 
 use crate::{PushArgs, path_info::PathInfo, store::Store, uploader::Uploader};
@@ -124,7 +124,7 @@ impl Push {
 
         for path in store_paths.into_iter() {
             if path.check_upstream_signature(&self.upstream_caches) {
-                trace!("skip {} (signature match)", path.absolute_path());
+                debug!("skip {} (signature match)", path.absolute_path());
                 self.signature_hit_count.fetch_add(1, Ordering::Release);
                 continue;
             }
@@ -139,13 +139,13 @@ impl Push {
                             .check_if_already_exists(&self.s3_client, self.bucket.clone())
                             .await
                         {
-                            trace!("skip {} (already exists)", path.absolute_path());
+                            debug!("skip {} (already exists)", path.absolute_path());
                             self.already_exists_count.fetch_add(1, Ordering::Relaxed);
                         } else {
                             tx.send(path).await.unwrap();
                         }
                     } else {
-                        trace!("skip {} (upstream hit)", path.absolute_path());
+                        debug!("skip {} (upstream hit)", path.absolute_path());
                         self.upstream_hit_count.fetch_add(1, Ordering::Relaxed);
                     }
                 })
@@ -161,13 +161,11 @@ impl Push {
 
     async fn upload(&'static self, mut rx: mpsc::Receiver<PathInfo>) -> Result<()> {
         let mut uploads = Vec::with_capacity(10);
-        let permits = Arc::new(Semaphore::new(10));
 
         loop {
             if let Some(path_to_upload) = rx.recv().await {
-                let absolute_path = path_to_upload.absolute_path();
+                println!("uploading: {}", path_to_upload.absolute_path());
 
-                println!("uploading: {}", absolute_path);
                 let uploader = Uploader::new(
                     &self.signing_key,
                     path_to_upload,
@@ -176,10 +174,7 @@ impl Push {
                 )?;
 
                 uploads.push(tokio::spawn({
-                    let permits = permits.clone();
-
                     async move {
-                        let _permit = permits.acquire().await;
                         let res = uploader.upload().await;
                         self.upload_count.fetch_add(1, Ordering::Relaxed);
                         res
diff --git a/src/store.rs b/src/store.rs
index 54f185c..4499243 100644
--- a/src/store.rs
+++ b/src/store.rs
@@ -44,7 +44,10 @@ impl Store {
         let inner = self.inner.clone();
 
         task::spawn_blocking(move || {
-            let mut c_path_info = inner.store().query_path_info(path.to_string().as_bytes())?;
+            let mut c_path_info = inner
+                .store()
+                .query_path_info(path.to_string().as_bytes())
+                .context("query cpp for path info")?;
 
             let signatures = c_path_info
                 .pin_mut()
@@ -60,7 +63,8 @@ impl Store {
                 .references()
                 .into_iter()
                 .map(|x| StorePath::from_bytes(x.as_bytes()))
-                .collect::<Result<_, _>>()?;
+                .collect::<Result<_, _>>()
+                .context("get references from pathinfo")?;
 
             Ok(PathInfo {
                 path,
diff --git a/src/uploader.rs b/src/uploader.rs
index cacae2b..eb955a2 100644
--- a/src/uploader.rs
+++ b/src/uploader.rs
@@ -23,6 +23,7 @@ pub struct Uploader<'a> {
     path: PathInfo,
     s3_client: &'a s3::Client,
     bucket: String,
+    hash: Sha256,
 }
 
 impl<'a> Uploader<'a> {
@@ -37,6 +38,7 @@ impl<'a> Uploader<'a> {
             path,
             s3_client,
             bucket,
+            hash: Sha256::new(),
         })
     }