diff --git a/rust/Makefile b/rust/Makefile
index 1f10f92737f2..6c0644b6090c 100644
--- a/rust/Makefile
+++ b/rust/Makefile
@@ -350,7 +350,7 @@ rust-analyzer:
 	$(Q)$(srctree)/scripts/generate_rust_analyzer.py \
 		--cfgs='core=$(core-cfgs)' --cfgs='alloc=$(alloc-cfgs)' \
 		$(realpath $(srctree)) $(realpath $(objtree)) \
-		$(RUST_LIB_SRC) $(KBUILD_EXTMOD) > \
+		$(rustc_sysroot) $(RUST_LIB_SRC) $(KBUILD_EXTMOD) > \
 		$(if $(KBUILD_EXTMOD),$(extmod_prefix),$(objtree))/rust-project.json
 
 redirect-intrinsics = \
diff --git a/scripts/generate_rust_analyzer.py b/scripts/generate_rust_analyzer.py
index f270c7b0cf34..d2bc63cde8c6 100755
--- a/scripts/generate_rust_analyzer.py
+++ b/scripts/generate_rust_analyzer.py
@@ -145,6 +145,7 @@ def main():
     parser.add_argument('--cfgs', action='append', default=[])
     parser.add_argument("srctree", type=pathlib.Path)
     parser.add_argument("objtree", type=pathlib.Path)
+    parser.add_argument("sysroot", type=pathlib.Path)
     parser.add_argument("sysroot_src", type=pathlib.Path)
     parser.add_argument("exttree", type=pathlib.Path, nargs="?")
     args = parser.parse_args()
@@ -154,9 +155,12 @@ def main():
         level=logging.INFO if args.verbose else logging.WARNING
     )
 
+    # Making sure that the `sysroot` and `sysroot_src` belong to the same toolchain.
+    assert args.sysroot in args.sysroot_src.parents
+
     rust_project = {
         "crates": generate_crates(args.srctree, args.objtree, args.sysroot_src, args.exttree, args.cfgs),
-        "sysroot_src": str(args.sysroot_src),
+        "sysroot": str(args.sysroot),
     }
 
     json.dump(rust_project, sys.stdout, sort_keys=True, indent=4)