chore(tvix/eval): prune some dependencies & features r/5988

* We no longer need backtrace-on-stack-overflow, as we no longer
  overflow the stack with the recent eval refactorings. This was weird
  voodoo anyways, introduced earlier to debug some cases where stack
  overflows occured.

* default features of genawaiter crate are not needed, as we don't use
  their proc macros

Change-Id: I346fc5a18d7f117ee805909a8be8f535b96be76c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8263
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
Reviewed-by: raitobezarius <tvl@lahfa.xyz>

4 files changed, 28 insertions, 597 deletions

diff --git a/tvix/Cargo.lock b/tvix/Cargo.lock
index 3381f6a8d4..278f811ecf 100644
--- a/tvix/Cargo.lock
+++ b/tvix/Cargo.lock
@@ -3,21 +3,6 @@
 version = 3
 
 [[package]]
-name = "addr2line"
-version = "0.19.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a76fd60b23679b7d19bd066031410fb7e458ccc5e958eb5c325888ce4baedc97"
-dependencies = [
- "gimli",
-]
-
-[[package]]
-name = "adler"
-version = "1.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
-
-[[package]]
 name = "aho-corasick"
 version = "0.7.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -146,32 +131,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "backtrace"
-version = "0.3.67"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "233d376d6d185f2a3093e58f283f60f880315b6c60075b01f36b3b85154564ca"
-dependencies = [
- "addr2line",
- "cc",
- "cfg-if",
- "libc",
- "miniz_oxide",
- "object",
- "rustc-demangle",
-]
-
-[[package]]
-name = "backtrace-on-stack-overflow"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d51cef6be4d7cb70701727ca9662b5b428833918c13c4095220763ba385ac9bd"
-dependencies = [
- "backtrace",
- "libc",
- "nix 0.23.2",
-]
-
-[[package]]
 name = "base64"
 version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -364,7 +323,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "684a277d672e91966334af371f1a7b5833f9aa00b07c84e92fbce95e00208ce8"
 dependencies = [
  "heck",
- "proc-macro-error 1.0.4",
+ "proc-macro-error",
  "proc-macro2 1.0.50",
  "quote 1.0.23",
  "syn 1.0.107",
@@ -832,8 +791,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c86bd0361bcbde39b13475e6e36cb24c329964aa2611be285289d1e4b751c1a0"
 dependencies = [
  "genawaiter-macro",
- "genawaiter-proc-macro",
- "proc-macro-hack",
 ]
 
 [[package]]
@@ -843,19 +800,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b32dfe1fdfc0bbde1f22a5da25355514b5e450c33a6af6770884c8750aedfbc"
 
 [[package]]
-name = "genawaiter-proc-macro"
-version = "0.99.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "784f84eebc366e15251c4a8c3acee82a6a6f427949776ecb88377362a9621738"
-dependencies = [
- "proc-macro-error 0.4.12",
- "proc-macro-hack",
- "proc-macro2 1.0.50",
- "quote 1.0.23",
- "syn 1.0.107",
-]
-
-[[package]]
 name = "generic-array"
 version = "0.12.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -886,12 +830,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "gimli"
-version = "0.27.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "221996f774192f0f718773def8201c4ae31f02616a54ccfc2d358bb0e5cefdec"
-
-[[package]]
 name = "glob"
 version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1276,15 +1214,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2a60c7ce501c71e03a9c9c0d35b861413ae925bd979cc7a4e30d060069aaac8d"
 
 [[package]]
-name = "miniz_oxide"
-version = "0.6.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b275950c28b37e794e8c55d88aeb5e139d0ce23fdbbeda68f8d7174abdf9e8fa"
-dependencies = [
- "adler",
-]
-
-[[package]]
 name = "mio"
 version = "0.8.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1313,19 +1242,6 @@ dependencies = [
 
 [[package]]
 name = "nix"
-version = "0.23.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8f3790c00a0150112de0f4cd161e3d7fc4b2d8a5542ffc35f099a2562aecb35c"
-dependencies = [
- "bitflags",
- "cc",
- "cfg-if",
- "libc",
- "memoffset 0.6.5",
-]
-
-[[package]]
-name = "nix"
 version = "0.25.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f346ff70e7dbfd675fe90590b92d59ef2de15a8779ae305ebcbfd3f0caf59be4"
@@ -1398,15 +1314,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "object"
-version = "0.30.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ea86265d3d3dcb6a27fc51bd29a4bf387fae9d2986b823079d4986af253eb439"
-dependencies = [
- "memchr",
-]
-
-[[package]]
 name = "once_cell"
 version = "1.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1582,24 +1489,11 @@ dependencies = [
 
 [[package]]
 name = "proc-macro-error"
-version = "0.4.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "18f33027081eba0a6d8aba6d1b1c3a3be58cbb12106341c2d5759fcd9b5277e7"
-dependencies = [
- "proc-macro-error-attr 0.4.12",
- "proc-macro2 1.0.50",
- "quote 1.0.23",
- "syn 1.0.107",
- "version_check",
-]
-
-[[package]]
-name = "proc-macro-error"
 version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "da25490ff9892aab3fcf7c36f08cfb902dd3e71ca0f9f9517bea02a73a5ce38c"
 dependencies = [
- "proc-macro-error-attr 1.0.4",
+ "proc-macro-error-attr",
  "proc-macro2 1.0.50",
  "quote 1.0.23",
  "syn 1.0.107",
@@ -1608,19 +1502,6 @@ dependencies = [
 
 [[package]]
 name = "proc-macro-error-attr"
-version = "0.4.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a5b4b77fdb63c1eca72173d68d24501c54ab1269409f6b672c85deb18af69de"
-dependencies = [
- "proc-macro2 1.0.50",
- "quote 1.0.23",
- "syn 1.0.107",
- "syn-mid",
- "version_check",
-]
-
-[[package]]
-name = "proc-macro-error-attr"
 version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a1be40180e52ecc98ad80b184934baf3d0d29f979574e439af5a55274b35f869"
@@ -1631,12 +1512,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "proc-macro-hack"
-version = "0.5.20+deprecated"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dc375e1527247fe1a97d8b7156678dfe7c1af2fc075c9a4db3690ecd2a148068"
-
-[[package]]
 name = "proc-macro2"
 version = "0.4.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1945,12 +1820,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "rustc-demangle"
-version = "0.1.21"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7ef03e0a2b150c7a90d01faf6254c9c48a41e95fb2a8c2ac1c6f0d2b9aefc342"
-
-[[package]]
 name = "rustc-hash"
 version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -2002,7 +1871,7 @@ dependencies = [
  "libc",
  "log",
  "memchr",
- "nix 0.25.1",
+ "nix",
  "radix_trie",
  "scopeguard",
  "unicode-segmentation",
@@ -2252,17 +2121,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "syn-mid"
-version = "0.5.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "baa8e7560a164edb1621a55d18a0c59abf49d360f47aa7b821061dd7eea7fac9"
-dependencies = [
- "proc-macro2 1.0.50",
- "quote 1.0.23",
- "syn 1.0.107",
-]
-
-[[package]]
 name = "sync_wrapper"
 version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -2326,7 +2184,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e45b7bf6e19353ddd832745c8fcf77a17a93171df7151187f26623f2b75b5b26"
 dependencies = [
  "cfg-if",
- "proc-macro-error 1.0.4",
+ "proc-macro-error",
  "proc-macro2 1.0.50",
  "quote 1.0.23",
  "syn 1.0.107",
@@ -2736,7 +2594,6 @@ dependencies = [
 name = "tvix-eval"
 version = "0.1.0"
 dependencies = [
- "backtrace-on-stack-overflow",
  "codemap",
  "codemap-diagnostic",
  "criterion",
diff --git a/tvix/Cargo.nix b/tvix/Cargo.nix
index 363db976dd..3dcb716d89 100644
--- a/tvix/Cargo.nix
+++ b/tvix/Cargo.nix
@@ -129,49 +129,6 @@ rec {
     #   inject test dependencies into the build
 
     crates = {
-      "addr2line" = rec {
-        crateName = "addr2line";
-        version = "0.19.0";
-        edition = "2015";
-        sha256 = "15ywmr5wx22q69ffnn79qp65ir5p1x0k2q06plcpv6v74c5xcvx7";
-        dependencies = [
-          {
-            name = "gimli";
-            packageId = "gimli";
-            usesDefaultFeatures = false;
-            features = [ "read" ];
-          }
-        ];
-        features = {
-          "alloc" = [ "dep:alloc" ];
-          "compiler_builtins" = [ "dep:compiler_builtins" ];
-          "core" = [ "dep:core" ];
-          "cpp_demangle" = [ "dep:cpp_demangle" ];
-          "default" = [ "rustc-demangle" "cpp_demangle" "std-object" "fallible-iterator" "smallvec" ];
-          "fallible-iterator" = [ "dep:fallible-iterator" ];
-          "object" = [ "dep:object" ];
-          "rustc-demangle" = [ "dep:rustc-demangle" ];
-          "rustc-dep-of-std" = [ "core" "alloc" "compiler_builtins" "gimli/rustc-dep-of-std" ];
-          "smallvec" = [ "dep:smallvec" ];
-          "std" = [ "gimli/std" ];
-          "std-object" = [ "std" "object" "object/std" "object/compression" "gimli/endian-reader" ];
-        };
-      };
-      "adler" = rec {
-        crateName = "adler";
-        version = "1.0.2";
-        edition = "2015";
-        sha256 = "1zim79cvzd5yrkzl3nyfx0avijwgk9fqv3yrscdy1cc79ih02qpj";
-        authors = [
-          "Jonas Schievink <jonasschievink@gmail.com>"
-        ];
-        features = {
-          "compiler_builtins" = [ "dep:compiler_builtins" ];
-          "core" = [ "dep:core" ];
-          "default" = [ "std" ];
-          "rustc-dep-of-std" = [ "core" "compiler_builtins" ];
-        };
-      };
       "aho-corasick" = rec {
         crateName = "aho-corasick";
         version = "0.7.20";
@@ -544,87 +501,6 @@ rec {
         ];
 
       };
-      "backtrace" = rec {
-        crateName = "backtrace";
-        version = "0.3.67";
-        edition = "2018";
-        sha256 = "1jk48laqafvbyc0mn1v0didk307qc0zji3z5jcq2lpqqdmnkfg93";
-        authors = [
-          "The Rust Project Developers"
-        ];
-        dependencies = [
-          {
-            name = "addr2line";
-            packageId = "addr2line";
-            usesDefaultFeatures = false;
-          }
-          {
-            name = "cfg-if";
-            packageId = "cfg-if";
-          }
-          {
-            name = "libc";
-            packageId = "libc";
-            usesDefaultFeatures = false;
-          }
-          {
-            name = "miniz_oxide";
-            packageId = "miniz_oxide";
-            usesDefaultFeatures = false;
-          }
-          {
-            name = "object";
-            packageId = "object";
-            usesDefaultFeatures = false;
-            features = [ "read_core" "elf" "macho" "pe" "unaligned" "archive" ];
-          }
-          {
-            name = "rustc-demangle";
-            packageId = "rustc-demangle";
-          }
-        ];
-        buildDependencies = [
-          {
-            name = "cc";
-            packageId = "cc";
-          }
-        ];
-        features = {
-          "cpp_demangle" = [ "dep:cpp_demangle" ];
-          "default" = [ "std" ];
-          "rustc-serialize" = [ "dep:rustc-serialize" ];
-          "serde" = [ "dep:serde" ];
-          "serialize-rustc" = [ "rustc-serialize" ];
-          "serialize-serde" = [ "serde" ];
-          "verify-winapi" = [ "winapi/dbghelp" "winapi/handleapi" "winapi/libloaderapi" "winapi/memoryapi" "winapi/minwindef" "winapi/processthreadsapi" "winapi/synchapi" "winapi/tlhelp32" "winapi/winbase" "winapi/winnt" ];
-          "winapi" = [ "dep:winapi" ];
-        };
-        resolvedDefaultFeatures = [ "default" "std" ];
-      };
-      "backtrace-on-stack-overflow" = rec {
-        crateName = "backtrace-on-stack-overflow";
-        version = "0.2.0";
-        edition = "2018";
-        sha256 = "1gf9b8wblqq74aal0g6130wq6a5lnmi9dji72xq71jypwimyy76m";
-        authors = [
-          "Aleksey Kladov <aleksey.kladov@gmail.com>"
-        ];
-        dependencies = [
-          {
-            name = "backtrace";
-            packageId = "backtrace";
-          }
-          {
-            name = "libc";
-            packageId = "libc";
-          }
-          {
-            name = "nix";
-            packageId = "nix 0.23.2";
-          }
-        ];
-
-      };
       "base64 0.10.1" = rec {
         crateName = "base64";
         version = "0.10.1";
@@ -1118,7 +994,7 @@ rec {
           }
           {
             name = "proc-macro-error";
-            packageId = "proc-macro-error 1.0.4";
+            packageId = "proc-macro-error";
           }
           {
             name = "proc-macro2";
@@ -2336,16 +2212,6 @@ rec {
             name = "genawaiter-macro";
             packageId = "genawaiter-macro";
           }
-          {
-            name = "genawaiter-proc-macro";
-            packageId = "genawaiter-proc-macro";
-            optional = true;
-          }
-          {
-            name = "proc-macro-hack";
-            packageId = "proc-macro-hack";
-            optional = true;
-          }
         ];
         features = {
           "default" = [ "proc_macro" ];
@@ -2355,7 +2221,6 @@ rec {
           "proc-macro-hack" = [ "dep:proc-macro-hack" ];
           "proc_macro" = [ "genawaiter-proc-macro" "proc-macro-hack" "genawaiter-macro/proc_macro" ];
         };
-        resolvedDefaultFeatures = [ "default" "genawaiter-proc-macro" "proc-macro-hack" "proc_macro" ];
       };
       "genawaiter-macro" = rec {
         crateName = "genawaiter-macro";
@@ -2366,41 +2231,6 @@ rec {
           "Devin R <devin.ragotzy@gmail.com>"
         ];
         features = { };
-        resolvedDefaultFeatures = [ "proc_macro" ];
-      };
-      "genawaiter-proc-macro" = rec {
-        crateName = "genawaiter-proc-macro";
-        version = "0.99.1";
-        edition = "2018";
-        sha256 = "0f0pcaln4wrpi35nwxs9g516ysiax373m32a3hjiavinpkp88kvq";
-        procMacro = true;
-        authors = [
-          "Devin R <devin.ragotzy@gmail.com>"
-        ];
-        dependencies = [
-          {
-            name = "proc-macro-error";
-            packageId = "proc-macro-error 0.4.12";
-          }
-          {
-            name = "proc-macro-hack";
-            packageId = "proc-macro-hack";
-          }
-          {
-            name = "proc-macro2";
-            packageId = "proc-macro2 1.0.50";
-          }
-          {
-            name = "quote";
-            packageId = "quote 1.0.23";
-          }
-          {
-            name = "syn";
-            packageId = "syn 1.0.107";
-            features = [ "visit-mut" "full" ];
-          }
-        ];
-        features = { };
       };
       "generic-array 0.12.4" = rec {
         crateName = "generic-array";
@@ -2485,27 +2315,6 @@ rec {
         };
         resolvedDefaultFeatures = [ "std" ];
       };
-      "gimli" = rec {
-        crateName = "gimli";
-        version = "0.27.1";
-        edition = "2018";
-        sha256 = "1v7xrvjv12rm5pycqm3ac411zqsa3hhgipkkhxqhybqrfkvrc692";
-        features = {
-          "alloc" = [ "dep:alloc" ];
-          "compiler_builtins" = [ "dep:compiler_builtins" ];
-          "core" = [ "dep:core" ];
-          "default" = [ "read" "write" "std" "fallible-iterator" "endian-reader" ];
-          "endian-reader" = [ "read" "stable_deref_trait" ];
-          "fallible-iterator" = [ "dep:fallible-iterator" ];
-          "indexmap" = [ "dep:indexmap" ];
-          "read" = [ "read-core" ];
-          "rustc-dep-of-std" = [ "core" "alloc" "compiler_builtins" ];
-          "stable_deref_trait" = [ "dep:stable_deref_trait" ];
-          "std" = [ "fallible-iterator/std" "stable_deref_trait/std" ];
-          "write" = [ "indexmap" ];
-        };
-        resolvedDefaultFeatures = [ "read" "read-core" ];
-      };
       "glob" = rec {
         crateName = "glob";
         version = "0.3.1";
@@ -3618,32 +3427,6 @@ rec {
         ];
 
       };
-      "miniz_oxide" = rec {
-        crateName = "miniz_oxide";
-        version = "0.6.2";
-        edition = "2018";
-        sha256 = "1yp8z6yll5ypz1ldmgnv7zi0r78kbvmqmn2mii77jzmk5069axdj";
-        authors = [
-          "Frommi <daniil.liferenko@gmail.com>"
-          "oyvindln <oyvindln@users.noreply.github.com>"
-        ];
-        dependencies = [
-          {
-            name = "adler";
-            packageId = "adler";
-            usesDefaultFeatures = false;
-          }
-        ];
-        features = {
-          "alloc" = [ "dep:alloc" ];
-          "compiler_builtins" = [ "dep:compiler_builtins" ];
-          "core" = [ "dep:core" ];
-          "default" = [ "with-alloc" ];
-          "rustc-dep-of-std" = [ "core" "alloc" "compiler_builtins" "adler/rustc-dep-of-std" ];
-          "simd" = [ "simd-adler32" ];
-          "simd-adler32" = [ "dep:simd-adler32" ];
-        };
-      };
       "mio" = rec {
         crateName = "mio";
         version = "0.8.5";
@@ -3716,44 +3499,7 @@ rec {
         ];
 
       };
-      "nix 0.23.2" = rec {
-        crateName = "nix";
-        version = "0.23.2";
-        edition = "2018";
-        sha256 = "0p5kxhm5d8lry0szqbsllpcb5i3z7lg1dkglw0ni2l011b090dwg";
-        authors = [
-          "The nix-rust Project Developers"
-        ];
-        dependencies = [
-          {
-            name = "bitflags";
-            packageId = "bitflags";
-          }
-          {
-            name = "cfg-if";
-            packageId = "cfg-if";
-          }
-          {
-            name = "libc";
-            packageId = "libc";
-            features = [ "extra_traits" ];
-          }
-          {
-            name = "memoffset";
-            packageId = "memoffset 0.6.5";
-            target = { target, features }: (!("redox" == target."os"));
-          }
-        ];
-        buildDependencies = [
-          {
-            name = "cc";
-            packageId = "cc";
-            target = { target, features }: ("dragonfly" == target."os");
-          }
-        ];
-
-      };
-      "nix 0.25.1" = rec {
+      "nix" = rec {
         crateName = "nix";
         version = "0.25.1";
         edition = "2018";
@@ -3978,43 +3724,6 @@ rec {
         ];
 
       };
-      "object" = rec {
-        crateName = "object";
-        version = "0.30.3";
-        edition = "2018";
-        sha256 = "0fdl7qjsz1j9kl3j7f4656fswzrqpyj2kgaizhknmjrx7mfjd1pa";
-        dependencies = [
-          {
-            name = "memchr";
-            packageId = "memchr";
-            usesDefaultFeatures = false;
-          }
-        ];
-        features = {
-          "all" = [ "read" "write" "std" "compression" "wasm" ];
-          "alloc" = [ "dep:alloc" ];
-          "compiler_builtins" = [ "dep:compiler_builtins" ];
-          "compression" = [ "flate2" "std" ];
-          "core" = [ "dep:core" ];
-          "crc32fast" = [ "dep:crc32fast" ];
-          "default" = [ "read" "compression" ];
-          "doc" = [ "read_core" "write_std" "std" "compression" "archive" "coff" "elf" "macho" "pe" "wasm" ];
-          "flate2" = [ "dep:flate2" ];
-          "hashbrown" = [ "dep:hashbrown" ];
-          "indexmap" = [ "dep:indexmap" ];
-          "pe" = [ "coff" ];
-          "read" = [ "read_core" "archive" "coff" "elf" "macho" "pe" "unaligned" ];
-          "rustc-dep-of-std" = [ "core" "compiler_builtins" "alloc" "memchr/rustc-dep-of-std" ];
-          "std" = [ "memchr/std" ];
-          "unstable-all" = [ "all" "unstable" "xcoff" ];
-          "wasm" = [ "wasmparser" ];
-          "wasmparser" = [ "dep:wasmparser" ];
-          "write" = [ "write_std" "coff" "elf" "macho" "pe" ];
-          "write_core" = [ "crc32fast" "indexmap" "hashbrown" ];
-          "write_std" = [ "write_core" "std" "indexmap/std" "crc32fast/std" ];
-        };
-        resolvedDefaultFeatures = [ "archive" "coff" "elf" "macho" "pe" "read_core" "unaligned" ];
-      };
       "once_cell" = rec {
         crateName = "once_cell";
         version = "1.17.0";
@@ -4451,43 +4160,7 @@ rec {
           "verbatim" = [ "syn/parsing" ];
         };
       };
-      "proc-macro-error 0.4.12" = rec {
-        crateName = "proc-macro-error";
-        version = "0.4.12";
-        edition = "2018";
-        sha256 = "1rvpaadwv7vmsp142qqh2axqrr9v78f1nvdsi9nhmfhy10kk1wqq";
-        authors = [
-          "CreepySkeleton <creepy-skeleton@yandex.ru>"
-        ];
-        dependencies = [
-          {
-            name = "proc-macro-error-attr";
-            packageId = "proc-macro-error-attr 0.4.12";
-          }
-          {
-            name = "proc-macro2";
-            packageId = "proc-macro2 1.0.50";
-          }
-          {
-            name = "quote";
-            packageId = "quote 1.0.23";
-          }
-          {
-            name = "syn";
-            packageId = "syn 1.0.107";
-            usesDefaultFeatures = false;
-            features = [ "derive" "parsing" "proc-macro" "printing" ];
-          }
-        ];
-        buildDependencies = [
-          {
-            name = "version_check";
-            packageId = "version_check";
-          }
-        ];
-
-      };
-      "proc-macro-error 1.0.4" = rec {
+      "proc-macro-error" = rec {
         crateName = "proc-macro-error";
         version = "1.0.4";
         edition = "2018";
@@ -4498,7 +4171,7 @@ rec {
         dependencies = [
           {
             name = "proc-macro-error-attr";
-            packageId = "proc-macro-error-attr 1.0.4";
+            packageId = "proc-macro-error-attr";
           }
           {
             name = "proc-macro2";
@@ -4528,44 +4201,7 @@ rec {
         };
         resolvedDefaultFeatures = [ "default" "syn" "syn-error" ];
       };
-      "proc-macro-error-attr 0.4.12" = rec {
-        crateName = "proc-macro-error-attr";
-        version = "0.4.12";
-        edition = "2018";
-        sha256 = "1pk9mwcfnpf8favgc2cl4sqlmi818p96hg8pfb51wg5nzmvlnnwa";
-        procMacro = true;
-        authors = [
-          "CreepySkeleton <creepy-skeleton@yandex.ru>"
-        ];
-        dependencies = [
-          {
-            name = "proc-macro2";
-            packageId = "proc-macro2 1.0.50";
-          }
-          {
-            name = "quote";
-            packageId = "quote 1.0.23";
-          }
-          {
-            name = "syn";
-            packageId = "syn 1.0.107";
-            usesDefaultFeatures = false;
-            features = [ "derive" "parsing" "proc-macro" "printing" ];
-          }
-          {
-            name = "syn-mid";
-            packageId = "syn-mid";
-          }
-        ];
-        buildDependencies = [
-          {
-            name = "version_check";
-            packageId = "version_check";
-          }
-        ];
-
-      };
-      "proc-macro-error-attr 1.0.4" = rec {
+      "proc-macro-error-attr" = rec {
         crateName = "proc-macro-error-attr";
         version = "1.0.4";
         edition = "2018";
@@ -4592,17 +4228,6 @@ rec {
         ];
 
       };
-      "proc-macro-hack" = rec {
-        crateName = "proc-macro-hack";
-        version = "0.5.20+deprecated";
-        edition = "2018";
-        sha256 = "0s402hmcs3k9nd6rlp07zkr1lz7yimkmcwcbgnly2zr44wamwdyw";
-        procMacro = true;
-        authors = [
-          "David Tolnay <dtolnay@gmail.com>"
-        ];
-
-      };
       "proc-macro2 0.4.30" = rec {
         crateName = "proc-macro2";
         version = "0.4.30";
@@ -5470,20 +5095,6 @@ rec {
           "serde1" = [ "serde" "text-size/serde" ];
         };
       };
-      "rustc-demangle" = rec {
-        crateName = "rustc-demangle";
-        version = "0.1.21";
-        edition = "2015";
-        sha256 = "0hn3xyd2n3bg3jnc5a5jbzll32n4r5a65bqzs287l30m5c53xw3y";
-        authors = [
-          "Alex Crichton <alex@alexcrichton.com>"
-        ];
-        features = {
-          "compiler_builtins" = [ "dep:compiler_builtins" ];
-          "core" = [ "dep:core" ];
-          "rustc-dep-of-std" = [ "core" "compiler_builtins" ];
-        };
-      };
       "rustc-hash" = rec {
         crateName = "rustc-hash";
         version = "1.1.0";
@@ -5701,7 +5312,7 @@ rec {
           }
           {
             name = "nix";
-            packageId = "nix 0.25.1";
+            packageId = "nix";
             usesDefaultFeatures = false;
             target = { target, features }: (target."unix" or false);
             features = [ "fs" "ioctl" "poll" "signal" "term" ];
@@ -6425,36 +6036,6 @@ rec {
         };
         resolvedDefaultFeatures = [ "clone-impls" "default" "derive" "extra-traits" "full" "parsing" "printing" "proc-macro" "quote" "visit" "visit-mut" ];
       };
-      "syn-mid" = rec {
-        crateName = "syn-mid";
-        version = "0.5.3";
-        edition = "2018";
-        sha256 = "1jgslzpdf78646wafyplc39lkgwsqnh1hpd544bdnkhn19bfga5s";
-        authors = [
-          "Taiki Endo <te316e89@gmail.com>"
-        ];
-        dependencies = [
-          {
-            name = "proc-macro2";
-            packageId = "proc-macro2 1.0.50";
-            usesDefaultFeatures = false;
-          }
-          {
-            name = "quote";
-            packageId = "quote 1.0.23";
-            usesDefaultFeatures = false;
-          }
-          {
-            name = "syn";
-            packageId = "syn 1.0.107";
-            usesDefaultFeatures = false;
-            features = [ "parsing" "printing" "derive" ];
-          }
-        ];
-        features = {
-          "clone-impls" = [ "syn/clone-impls" ];
-        };
-      };
       "sync_wrapper" = rec {
         crateName = "sync_wrapper";
         version = "0.1.2";
@@ -6609,7 +6190,7 @@ rec {
           }
           {
             name = "proc-macro-error";
-            packageId = "proc-macro-error 1.0.4";
+            packageId = "proc-macro-error";
           }
           {
             name = "proc-macro2";
@@ -8045,6 +7626,10 @@ rec {
             packageId = "dirs";
           }
           {
+            name = "lazy_static";
+            packageId = "lazy_static";
+          }
+          {
             name = "nix-compat";
             packageId = "nix-compat";
           }
@@ -8053,6 +7638,10 @@ rec {
             packageId = "rustyline";
           }
           {
+            name = "serde_json";
+            packageId = "serde_json";
+          }
+          {
             name = "smol_str";
             packageId = "smol_str";
           }
@@ -8061,6 +7650,10 @@ rec {
             packageId = "ssri";
           }
           {
+            name = "tempfile";
+            packageId = "tempfile";
+          }
+          {
             name = "thiserror";
             packageId = "thiserror";
           }
@@ -8088,11 +7681,6 @@ rec {
         libName = "tvix_eval";
         dependencies = [
           {
-            name = "backtrace-on-stack-overflow";
-            packageId = "backtrace-on-stack-overflow";
-            optional = true;
-          }
-          {
             name = "codemap";
             packageId = "codemap";
           }
@@ -8107,6 +7695,7 @@ rec {
           {
             name = "genawaiter";
             packageId = "genawaiter";
+            usesDefaultFeatures = false;
           }
           {
             name = "imbl";
@@ -8205,13 +7794,11 @@ rec {
         ];
         features = {
           "arbitrary" = [ "proptest" "test-strategy" "imbl/proptest" ];
-          "backtrace-on-stack-overflow" = [ "dep:backtrace-on-stack-overflow" ];
-          "backtrace_overflow" = [ "backtrace-on-stack-overflow" ];
-          "default" = [ "impure" "arbitrary" "nix_tests" "backtrace_overflow" ];
+          "default" = [ "impure" "arbitrary" "nix_tests" ];
           "proptest" = [ "dep:proptest" ];
           "test-strategy" = [ "dep:test-strategy" ];
         };
-        resolvedDefaultFeatures = [ "arbitrary" "backtrace-on-stack-overflow" "backtrace_overflow" "default" "impure" "nix_tests" "proptest" "test-strategy" ];
+        resolvedDefaultFeatures = [ "arbitrary" "default" "impure" "nix_tests" "proptest" "test-strategy" ];
       };
       "tvix-eval-builtin-macros" = rec {
         crateName = "tvix-eval-builtin-macros";
diff --git a/tvix/eval/Cargo.toml b/tvix/eval/Cargo.toml
index 6bb68834ab..e59249f1e7 100644
--- a/tvix/eval/Cargo.toml
+++ b/tvix/eval/Cargo.toml
@@ -9,12 +9,11 @@ edition = "2021"
 name = "tvix_eval"
 
 [dependencies]
-backtrace-on-stack-overflow = { version = "0.2.0", optional = true }
 builtin-macros = { path = "./builtin-macros", package = "tvix-eval-builtin-macros" }
 codemap = "0.1.3"
 codemap-diagnostic = "0.1.1"
 dirs = "4.0.0"
-genawaiter = "0.99.1"
+genawaiter = { version = "0.99.1", default_features = false }
 imbl = { version = "2.0", features = [ "serde" ] }
 lazy_static = "1.4.0"
 lexical-core = { version = "0.8.5", features = ["format", "parse-floats"] }
@@ -44,7 +43,7 @@ git = "https://github.com/JamesGuthrie/test-generator.git"
 rev = "82e799979980962aec1aa324ec6e0e4cad781f41"
 
 [features]
-default = ["impure", "arbitrary", "nix_tests", "backtrace_overflow"]
+default = ["impure", "arbitrary", "nix_tests"]
 
 # Enables running the Nix language test suite from the original C++
 # Nix implementation (at version 2.3) against Tvix.
@@ -56,9 +55,6 @@ impure = []
 # Enables Arbitrary impls for internal types (required to run tests)
 arbitrary = ["proptest", "test-strategy", "imbl/proptest"]
 
-# For debugging use only; not appropriate for production use.
-backtrace_overflow = ["backtrace-on-stack-overflow"]
-
 [[bench]]
 name = "eval"
 harness = false
diff --git a/tvix/eval/src/vm/mod.rs b/tvix/eval/src/vm/mod.rs
index ca974dff12..6ecd264d36 100644
--- a/tvix/eval/src/vm/mod.rs
+++ b/tvix/eval/src/vm/mod.rs
@@ -229,15 +229,6 @@ impl<'o> VM<'o> {
         globals: Rc<GlobalsMap>,
         reasonable_span: LightSpan,
     ) -> Self {
-        // Backtrace-on-stack-overflow is some seriously weird voodoo and
-        // very unsafe.  This double-guard prevents it from accidentally
-        // being enabled on release builds.
-        #[cfg(debug_assertions)]
-        #[cfg(feature = "backtrace_overflow")]
-        unsafe {
-            backtrace_on_stack_overflow::enable();
-        };
-
         Self {
             nix_search_path,
             io_handle,