nix: remove jemalloc (now default) targets, add jq input for default

jq input change was from 17eb354590
to prevent unnecessary bindgen rebuilds

Signed-off-by: strawberry <strawberry@puppygock.gay>

flake.nix

@@ -105,11 +105,6 @@
         hmalloc = scopeHost.main.override { features = ["hardened_malloc"]; };
 
         oci-image = scopeHost.oci-image;
-        oci-image-jemalloc = scopeHost.oci-image.override {
-          main = scopeHost.main.override {
-            features = ["jemalloc"];
-          };
-        };
         oci-image-hmalloc = scopeHost.oci-image.override {
           main = scopeHost.main.override {
             features = ["hardened_malloc"];
@@ -144,14 +139,6 @@
                   value = scopeCrossStatic.main;
                 }
 
-                # An output for a statically-linked binary with jemalloc
-                {
-                  name = "${binaryName}-jemalloc";
-                  value = scopeCrossStatic.main.override {
-                    features = ["jemalloc"];
-                  };
-                }
-
                 # An output for a statically-linked binary with hardened_malloc
                 {
                   name = "${binaryName}-hmalloc";
@@ -166,16 +153,6 @@
                   value = scopeCrossStatic.oci-image;
                 }
 
-                # An output for an OCI image based on that binary with jemalloc
-                {
-                  name = "oci-image-${crossSystem}-jemalloc";
-                  value = scopeCrossStatic.oci-image.override {
-                    main = scopeCrossStatic.main.override {
-                      features = ["jemalloc"];
-                    };
-                  };
-                }
-
                 # An output for an OCI image based on that binary with hardened_malloc
                 {
                   name = "oci-image-${crossSystem}-hmalloc";

nix/pkgs/main/default.nix

@@ -1,6 +1,7 @@
 # Dependencies (keep sorted)
 { craneLib
 , inputs
+, jq
 , lib
 , libiconv
 , liburing
@@ -87,6 +88,9 @@ buildDepsOnlyEnv =
     });
   in
   {
+    # https://crane.dev/faq/rebuilds-bindgen.html
+    NIX_OUTPATH_USED_AS_RANDOM_SEED = "aaaaaaaaaa";
+
     CARGO_PROFILE = profile;
     ROCKSDB_INCLUDE_DIR = "${rocksdb'}/include";
     ROCKSDB_LIB_DIR = "${rocksdb'}/lib";
@@ -146,6 +150,12 @@ commonAttrs = {
       # weirdness", pkgs.rustPlatform.bindgenHook on its own doesn't quite do the
       # right thing here.
       pkgsBuildHost.rustPlatform.bindgenHook
+
+      # We don't actually depend on `jq`, but crane's `buildPackage` does, but
+      # its `buildDepsOnly` doesn't. This causes those two derivations to have
+      # differing values for `NIX_CFLAGS_COMPILE`, which contributes to spurious
+      # rebuilds of bindgen and its depedents.
+      jq
   ]
   ++ lib.optionals stdenv.isDarwin [
       # https://github.com/NixOS/nixpkgs/issues/206242
@@ -173,9 +183,6 @@ craneLib.buildPackage ( commonAttrs // {
   cargoCheckCommand = "";
   doCheck = false;
 
-  # https://crane.dev/faq/rebuilds-bindgen.html
-  NIX_OUTPATH_USED_AS_RANDOM_SEED = "aaaaaaaaaa";
-
   env = buildPackageEnv;
 
   passthru = {