diff --git a/pkgs/development/compilers/rust/1_78.nix b/pkgs/development/compilers/rust/1_78.nix
index 3ce368e8d99fb..d81e964fb7458 100644
--- a/pkgs/development/compilers/rust/1_78.nix
+++ b/pkgs/development/compilers/rust/1_78.nix
@@ -49,6 +49,7 @@ import ./default.nix {
     aarch64-apple-darwin = "415bb2bc198feb0f2d8329e33c57d0890bbd57977d1ae48b17f6c7e1f632eaa7";
     powerpc64le-unknown-linux-gnu = "79582acb339bd2d79fef095b977049049ffa04616011f1af1793fb8e98194b19";
     riscv64gc-unknown-linux-gnu = "300fe4861e2d1f6e4c4f5e36ae7997beca8a979343a7f661237ab78a37a54648";
+    x86_64-unknown-freebsd = "72f49040fc2ed4492cddfaef3b4a9cb28d008f9f5ce5cac50802a5fca910f58c";
   };
 
   selectRustPackage = pkgs: pkgs.rust_1_78;
diff --git a/pkgs/development/compilers/rust/binary.nix b/pkgs/development/compilers/rust/binary.nix
index c546e278e7fa8..80959d98fd7d6 100644
--- a/pkgs/development/compilers/rust/binary.nix
+++ b/pkgs/development/compilers/rust/binary.nix
@@ -35,7 +35,8 @@ rec {
 
     nativeBuildInputs = lib.optional (!stdenv.isDarwin) autoPatchelfHook;
     buildInputs = [ bash ]
-      ++ lib.optionals (!stdenv.isDarwin) [ gcc.cc.lib zlib ]
+      ++ lib.optional (!stdenv.isDarwin && !stdenv.isFreeBSD) gcc.cc.lib
+      ++ lib.optional (!stdenv.isDarwin) zlib
       ++ lib.optional stdenv.isDarwin Security;
 
     postPatch = ''
@@ -81,7 +82,7 @@ rec {
     nativeBuildInputs = [ makeWrapper ]
       ++ lib.optional (!stdenv.isDarwin) autoPatchelfHook;
     buildInputs = [ bash ]
-      ++ lib.optional (!stdenv.isDarwin) gcc.cc.lib
+      ++ lib.optional (!stdenv.isDarwin && !stdenv.isFreeBSD) gcc.cc.lib
       ++ lib.optional stdenv.isDarwin Security;
 
     postPatch = ''
diff --git a/pkgs/development/compilers/rust/print-hashes.sh b/pkgs/development/compilers/rust/print-hashes.sh
index ebf8d900bb3b5..54c15406df670 100755
--- a/pkgs/development/compilers/rust/print-hashes.sh
+++ b/pkgs/development/compilers/rust/print-hashes.sh
@@ -19,6 +19,7 @@ PLATFORMS=(
   aarch64-apple-darwin
   powerpc64le-unknown-linux-gnu
   riscv64gc-unknown-linux-gnu
+  x86_64-unknown-freebsd
 )
 BASEURL=https://static.rust-lang.org/dist
 VERSION=${1:-}
diff --git a/pkgs/development/compilers/rust/rustc.nix b/pkgs/development/compilers/rust/rustc.nix
index 254732ed26035..82a8e09c84afc 100644
--- a/pkgs/development/compilers/rust/rustc.nix
+++ b/pkgs/development/compilers/rust/rustc.nix
@@ -58,8 +58,11 @@ in stdenv.mkDerivation (finalAttrs: {
 
   NIX_LDFLAGS = toString (
        # when linking stage1 libstd: cc: undefined reference to `__cxa_begin_catch'
-       optional (stdenv.isLinux && !withBundledLLVM) "--push-state --as-needed -lstdc++ --pop-state"
+       # This doesn't apply to cross-building for FreeBSD because the host
+       # uses libstdc++, but the target (used for building std) uses libc++
+       optional (stdenv.isLinux && !withBundledLLVM && !stdenv.targetPlatform.isFreeBSD) "--push-state --as-needed -lstdc++ --pop-state"
     ++ optional (stdenv.isDarwin && !withBundledLLVM) "-lc++ -lc++abi"
+    ++ optional stdenv.isFreeBSD "-rpath ${llvmPackages.libunwind}/lib"
     ++ optional stdenv.isDarwin "-rpath ${llvmSharedForHost}/lib");
 
   # Increase codegen units to introduce parallelism within the compiler.
@@ -214,6 +217,11 @@ in stdenv.mkDerivation (finalAttrs: {
     [source.vendored-sources]
     directory = "vendor"
     EOF
+  '' + lib.optionalString (stdenv.isFreeBSD) ''
+    # lzma-sys bundles an old version of xz that doesn't build
+    # on modern FreeBSD, use the system one instead
+    substituteInPlace src/bootstrap/src/core/build_steps/tool.rs \
+        --replace 'cargo.env("LZMA_API_STATIC", "1");' ' '
   '';
 
   # rustc unfortunately needs cmake to compile llvm-rt but doesn't