diff --git a/bench/sf1000-repro/README.md b/bench/sf1000-repro/README.md
index efd442b3e7..d71c9f442a 100644
--- a/bench/sf1000-repro/README.md
+++ b/bench/sf1000-repro/README.md
@@ -27,6 +27,11 @@ pixi run bash bench/sf1000-repro/build-libcudf.sh
 DATA=/path/to/tpch_parquet_sf1000 pixi run bash bench/sf1000-repro/run.sh
 ```
 
+The build helper takes `nvJitLink.h` and `libnvJitLink.so.13` from Pixi's
+`libnvjitlink-dev`/`libnvjitlink` packages; it does not require a system CUDA
+toolkit. To check those inputs without cloning or compiling cuDF, run
+`SIRIUS_CUDA_PREFLIGHT_ONLY=1 pixi run --frozen bash bench/sf1000-repro/build-libcudf.sh`.
+
 For the TPC-H **official power/throughput run** (RF1/RF2 refresh functions, Power@Size /
 Throughput@Size / QphH@Size) with this same performance stack, use `run-power.sh` — it runs on a
 native `.duckdb` dataset (the MVCC refresh path needs it) with the mixed-tier pin layout in
diff --git a/bench/sf1000-repro/build-libcudf.sh b/bench/sf1000-repro/build-libcudf.sh
index 6db28c95a5..d85dadf232 100755
--- a/bench/sf1000-repro/build-libcudf.sh
+++ b/bench/sf1000-repro/build-libcudf.sh
@@ -14,7 +14,34 @@ CUDF_SRC="${CUDF_SRC:-$HOME/cudf-src}"
 SHIM="${SHIM:-$HOME/cudf-shim}"
 BRANCH=perf/sirius-sf1000-repro
 
-[ -n "${CONDA_PREFIX:-}" ] || { echo "ERROR: run inside the pixi env (pixi run bash $0)"; exit 1; }
+[ -n "${PIXI_PROJECT_ROOT:-}" ] && [ -n "${PIXI_ENVIRONMENT_NAME:-}" ] &&
+  [ -d "${CONDA_PREFIX:-}" ] &&
+  [ "$(realpath "$CONDA_PREFIX")" = "$(realpath "$PIXI_PROJECT_ROOT/.pixi/envs/$PIXI_ENVIRONMENT_NAME")" ] || {
+  echo "ERROR: run inside the Sirius pixi env (pixi run --frozen bash $0)" >&2
+  exit 1
+}
+
+# jitify2_preprocess needs the development header, not just libnvJitLink's
+# runtime. Both must come from the same Pixi environment as cuDF and NVCC.
+NVJITLINK_HEADER=
+for include_dir in "$CONDA_PREFIX/include" "$CONDA_PREFIX/targets/$(uname -m)-linux/include"; do
+  if [ -f "$include_dir/nvJitLink.h" ]; then
+    NVJITLINK_HEADER=$include_dir/nvJitLink.h
+    break
+  fi
+done
+[ -n "$NVJITLINK_HEADER" ] || {
+  echo "ERROR: Pixi libnvjitlink-dev is missing nvJitLink.h; run pixi install --frozen" >&2
+  exit 1
+}
+[ -f "$CONDA_PREFIX/lib/libnvJitLink.so.13" ] || {
+  echo "ERROR: Pixi libnvjitlink is missing libnvJitLink.so.13; run pixi install --frozen" >&2
+  exit 1
+}
+if [ "${SIRIUS_CUDA_PREFLIGHT_ONLY:-0}" = 1 ]; then
+  echo "Pixi CUDA development inputs are present in $CONDA_PREFIX"
+  exit 0
+fi
 
 if [ ! -d "$CUDF_SRC/.git" ]; then
   echo "==> cloning felipeblazing/cudf @ $BRANCH"
@@ -26,15 +53,11 @@ else
   git -C "$CUDF_SRC" checkout -q FETCH_HEAD
 fi
 
-# The pixi env ships the libnvjitlink RUNTIME but not its dev header, and jitify2_preprocess
-# needs nvJitLink.h. Symlink JUST that header (plus the .so name jitify expects) rather than
-# putting the whole system CUDA include tree ahead of conda's -- that would cause version skew.
+# Keep the jitify2 shim, but link only inputs from the activated Pixi prefix.
 echo "==> nvJitLink shim at $SHIM"
 mkdir -p "$SHIM/include" "$SHIM/lib"
-SYS_CUDA=$(ls -d /usr/local/cuda-13.*/targets/*/include 2>/dev/null | head -1)
-[ -n "$SYS_CUDA" ] || { echo "ERROR: no system CUDA 13.x include dir for nvJitLink.h"; exit 1; }
-ln -sf "$SYS_CUDA/nvJitLink.h" "$SHIM/include/nvJitLink.h"
-ln -sf "$(ls "$CONDA_PREFIX"/lib/libnvJitLink.so.13* | head -1)" "$SHIM/lib/libnvJitLink.so"
+ln -sf "$NVJITLINK_HEADER" "$SHIM/include/nvJitLink.h"
+ln -sf "$CONDA_PREFIX/lib/libnvJitLink.so.13" "$SHIM/lib/libnvJitLink.so"
 
 # CRITICAL: append to $CXXFLAGS / $LDFLAGS, never replace them. Passing a bare
 # -DCMAKE_CXX_FLAGS= clobbers conda's flags, dropping -isystem $CONDA_PREFIX/include; CMake then
diff --git a/pixi.lock b/pixi.lock
index b2bdd9c6b8..11420277c2 100644
--- a/pixi.lock
+++ b/pixi.lock
@@ -722,6 +722,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/linux-64/libnvcomp-dev-5.3.0.16-h7bcfba5_0.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/libnvfatbin-13.4.92-hd2095e1_0.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/libnvjitlink-13.4.92-hd2095e1_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/libnvjitlink-dev-13.4.92-hd2095e1_0.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/libnvptxcompiler-dev-13.4.92-ha770c72_0.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/libopenblas-0.3.34-pthreads_hcf972fe_1.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/libopentelemetry-cpp-1.27.0-h3133023_1.conda
@@ -986,6 +987,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/linux-aarch64/libnvcomp-dev-5.3.0.16-he387df4_0.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-aarch64/libnvfatbin-13.4.92-hae6cbe8_0.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-aarch64/libnvjitlink-13.4.92-hae6cbe8_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-aarch64/libnvjitlink-dev-13.4.92-hae6cbe8_0.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-aarch64/libnvptxcompiler-dev-13.4.92-h579c4fd_0.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-aarch64/libopenblas-0.3.34-pthreads_hdd72021_1.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-aarch64/libopentelemetry-cpp-1.27.0-hbe47268_1.conda
@@ -1397,6 +1399,7 @@ environments:
       - conda: https://conda.anaconda.org/conda-forge/linux-64/libnvcomp-dev-5.3.0.16-h7bcfba5_0.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/libnvfatbin-13.3.29-hecca717_1.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/libnvjitlink-13.4.92-hd2095e1_0.conda
+      - conda: https://conda.anaconda.org/conda-forge/linux-64/libnvjitlink-dev-13.4.92-hd2095e1_0.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/libnvptxcompiler-dev-13.3.73-ha770c72_1.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/libopenblas-0.3.34-pthreads_hf13c14d_2.conda
       - conda: https://conda.anaconda.org/conda-forge/linux-64/libopentelemetry-cpp-1.27.0-h3133023_1.conda
diff --git a/pixi.toml b/pixi.toml
index 4a7ddba4be..cdb19b5ce9 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -23,6 +23,7 @@ bc = "*"
 cmake = "4.*"
 cuda-nvcc = "*"
 cuda-nvml-dev = "*"
+cuda-sanitizer-api = "*"
 cxx-compiler = "*"
 make = "*"
 ninja = "*"
@@ -88,6 +89,7 @@ platforms = ["linux-64-cuda13", "linux-aarch64-cuda13"]
 cuda-version = "13.4.*"
 libcudf = "==26.08.01"
 libcuvs = "==26.08.01"
+libnvjitlink-dev = "*"
 
 [feature.cuda13.activation.env]
 # GPU architectures: Turing through Blackwell (75, 80, 86, 89, 90a, 100f, 120a, 120)
@@ -117,6 +119,7 @@ cuda-version = "13.3.*"
 libcudf = "==26.08.01"
 libcuvs = "==26.08.01"
 librmm = "26.08.*"
+libnvjitlink-dev = "*"
 gcc_linux-64 = "14.*"
 gxx_linux-64 = "14.*"
 patchelf = "*"
diff --git a/test/scripts/sanitizer_gate_22.sh b/test/scripts/sanitizer_gate_22.sh
index 1afa7c9b3c..dad8d64b71 100755
--- a/test/scripts/sanitizer_gate_22.sh
+++ b/test/scripts/sanitizer_gate_22.sh
@@ -65,10 +65,16 @@
 
 set -euo pipefail
 
-CUDA_BIN=$(ls -1 /usr/local/cuda*/bin/compute-sanitizer 2>/dev/null | head -1)
-if [[ -z "${CUDA_BIN}" ]]; then
-  echo "[p22-sanitizer-gate] ERROR: compute-sanitizer not found under /usr/local/cuda*/bin/"
-  echo "[p22-sanitizer-gate] HINT: install CUDA toolkit, or set CUDA_BIN env override"
+if [[ -z "${PIXI_PROJECT_ROOT:-}" || -z "${PIXI_ENVIRONMENT_NAME:-}" || -z "${CONDA_PREFIX:-}" ||
+      ! -d "${CONDA_PREFIX:-}" ||
+      "$(realpath "${CONDA_PREFIX:-/nonexistent}")" != "$(realpath "${PIXI_PROJECT_ROOT:-/nonexistent}/.pixi/envs/${PIXI_ENVIRONMENT_NAME:-missing}")" ]]; then
+  echo "[p22-sanitizer-gate] ERROR: run inside the Sirius Pixi environment"
+  exit 2
+fi
+CUDA_BIN="${CONDA_PREFIX}/bin/compute-sanitizer"
+if [[ ! -x "${CUDA_BIN}" ]]; then
+  echo "[p22-sanitizer-gate] ERROR: Pixi compute-sanitizer missing at ${CUDA_BIN}"
+  echo "[p22-sanitizer-gate] HINT: run pixi install --frozen"
   exit 2
 fi
 
@@ -79,7 +85,7 @@ TIMEOUT_SEC="${P22_TIMEOUT_SEC:-600}"
 
 if [[ ! -x "${UNIT}" ]]; then
   echo "[p22-sanitizer-gate] ERROR: unittest binary not found or not executable at ${UNIT}"
-  echo "[p22-sanitizer-gate] HINT: build first (mcp__project-commands__run_command build)"
+  echo "[p22-sanitizer-gate] HINT: build the Sirius unit tests in this Pixi environment"
   echo "[p22-sanitizer-gate] HINT: or set P22_UNITTEST_BIN env override"
   exit 2
 fi