diff --git a/ci/scripts/setup_rust.sh b/ci/scripts/setup_rust.sh
index a013e7f88..f3544f8c4 100755
--- a/ci/scripts/setup_rust.sh
+++ b/ci/scripts/setup_rust.sh
@@ -26,8 +26,8 @@
 set -eux
 
 RUSTUP_VERSION=${RUSTUP_VERSION:-1.29.0}
-# 1.90.0 is the minimum required by paimon-full-text 0.1.0 (rust-version in its Cargo.toml).
-RUST_VERSION=${RUST_VERSION:-1.90.0}
+# Keep in sync with PAIMON_RUST_TOOLCHAIN in cmake_modules/ThirdpartyToolchain.cmake.
+RUST_VERSION=${RUST_VERSION:-1.95.0}
 CBINDGEN_VERSION=${CBINDGEN_VERSION:-0.29.2}
 PROTOC_VERSION=27.4
 
@@ -76,11 +76,6 @@ if ! command -v protoc >/dev/null 2>&1 || \
     echo "${protoc_home}/bin" >> "${GITHUB_PATH:-/dev/null}" || true
 fi
 
-# Vortex's FFI build pins rust-version >= 1.95 and is invoked with RUSTUP_TOOLCHAIN=stable (see
-# cmake_modules/ThirdpartyToolchain.cmake). Install the stable channel alongside the pinned default
-# so Vortex builds with it while Lance, Mosaic and tantivy-fts keep using the default toolchain.
-rustup toolchain install stable --profile minimal
-
 # cbindgen is used by the crate's build.rs to emit the C header that the
 # C++ side includes. Corrosion will also run cbindgen at CMake configure
 # time; both paths need it available.
diff --git a/cmake_modules/ThirdpartyToolchain.cmake b/cmake_modules/ThirdpartyToolchain.cmake
index ac94fc2b4..4910d1c23 100644
--- a/cmake_modules/ThirdpartyToolchain.cmake
+++ b/cmake_modules/ThirdpartyToolchain.cmake
@@ -1499,6 +1499,11 @@ macro(build_vortex)
     # neither of which can go through paimon's filesystem. `callback_io.rs` adds an entry point
     # backed by host callbacks; it is maintained in this repository and injected into the Vortex
     # source tree, and the patch only declares the module.
+    # Keep in sync with RUST_VERSION in ci/scripts/setup_rust.sh; it overrides the
+    # rust-toolchain.toml shipped inside the Vortex archive.
+    set(PAIMON_RUST_TOOLCHAIN
+        "1.95.0"
+        CACHE STRING "Rust toolchain used by the Vortex FFI build.")
     set(VORTEX_PATCH_FILE "${CMAKE_CURRENT_LIST_DIR}/vortex.diff")
     set(VORTEX_CALLBACK_IO_SRC
         "${CMAKE_SOURCE_DIR}/crates/vortex_callback_io/callback_io.rs")
@@ -1533,8 +1538,8 @@ macro(build_vortex)
                                       "${VORTEX_CALLBACK_IO_SRC}"
                                       "<SOURCE_DIR>/vortex-ffi/src/callback_io.rs"
                         COMMAND ${CMAKE_COMMAND} -E env "FLATC=${VORTEX_FLATC}"
-                                "RUSTUP_TOOLCHAIN=stable" "CC=${CMAKE_C_COMPILER}"
-                                "CXX=${CMAKE_CXX_COMPILER}"
+                                "RUSTUP_TOOLCHAIN=${PAIMON_RUST_TOOLCHAIN}"
+                                "CC=${CMAKE_C_COMPILER}" "CXX=${CMAKE_CXX_COMPILER}"
                                 "CARGO_TARGET_DIR=${VORTEX_CARGO_TARGET_DIR}"
                                 "RUSTFLAGS=-Crelocation-model=pic"
                                 ${PAIMON_CARGO_EXECUTABLE} rustc --locked --package