diff --git a/flake.nix b/flake.nix
index d10bab12..07cea776 100644
--- a/flake.nix
+++ b/flake.nix
@@ -6,6 +6,7 @@
   outputs = { self, nixpkgs }:
     let
       pkgs = import nixpkgs { system = "x86_64-linux"; };
+      pkgs32 = import nixpkgs { system = "i686-linux"; };
     in rec {
       packages.x86_64-linux = rec {
         llvm-nac3 = pkgs.callPackage ./nix/llvm {};
@@ -15,6 +16,22 @@
           ln -s ${pkgs.llvmPackages_14.clang-unwrapped}/bin/clang $out/bin/clang-irrt
           ln -s ${pkgs.llvmPackages_14.llvm.out}/bin/llvm-as $out/bin/llvm-as-irrt
           '';
+        demo-linalg-stub = pkgs.rustPlatform.buildRustPackage {
+          name = "demo-linalg-stub";
+          src = ./nac3standalone/demo/linalg;
+          cargoLock = {
+            lockFile = ./nac3standalone/demo/linalg/Cargo.lock;
+          };
+          doCheck = false;
+        };
+        demo-linalg-stub32 = pkgs32.rustPlatform.buildRustPackage {
+          name = "demo-linalg-stub32";
+          src = ./nac3standalone/demo/linalg;
+          cargoLock = {
+            lockFile = ./nac3standalone/demo/linalg/Cargo.lock;
+          };
+          doCheck = false;
+        };
         nac3artiq = pkgs.python3Packages.toPythonModule (
           pkgs.rustPlatform.buildRustPackage rec {
             name = "nac3artiq";
@@ -32,7 +49,9 @@
               echo "Checking nac3standalone demos..."
               pushd nac3standalone/demo
               patchShebangs .
-              ./check_demos.sh
+              export DEMO_LINALG_STUB=${demo-linalg-stub}/lib/liblinalg.a
+              export DEMO_LINALG_STUB32=${demo-linalg-stub32}/lib/liblinalg.a
+              ./check_demos.sh -i686
               popd
               echo "Running Cargo tests..."
               cargoCheckHook
@@ -162,6 +181,11 @@
           pre-commit
           rustfmt
         ];
+        shellHook =
+          ''
+          export DEMO_LINALG_STUB=${packages.x86_64-linux.demo-linalg-stub}/lib/liblinalg.a
+          export DEMO_LINALG_STUB32=${packages.x86_64-linux.demo-linalg-stub32}/lib/liblinalg.a
+          '';
       };
       devShells.x86_64-linux.msys2 = pkgs.mkShell {
         name = "nac3-dev-shell-msys2";
diff --git a/nac3standalone/demo/check_demo.sh b/nac3standalone/demo/check_demo.sh
index 716a9472..d31ebe21 100755
--- a/nac3standalone/demo/check_demo.sh
+++ b/nac3standalone/demo/check_demo.sh
@@ -3,26 +3,49 @@
 set -e
 
 if [ -z "$1" ]; then
-  echo "Requires at least one argument"
-  exit 1
+    echo "No argument supplied"
+    exit 1
 fi
 
 declare -a nac3args
+while [ $# -ge 2 ]; do
+  case "$1" in
+    --help)
+      echo "Usage: check_demo.sh [-i686] -- demo [NAC3ARGS...]"
+      exit
+      ;;
+    -i686)
+      i686=1
+      ;;
+    --)
+      shift
+      break
+      ;;
+    *)
+      break
+      ;;
+  esac
+  shift
+done
+
+demo="$1"
+shift
 while [ $# -gt 1 ]; do
   nac3args+=("$1")
   shift
 done
-demo="$1"
+
 
 echo "### Checking $demo..."
 
-# Get reference output
 echo ">>>>>> Running $demo with the Python interpreter"
 ./interpret_demo.py "$demo" > interpreted.log
 
-echo "...... Trying NAC3's 32-bit code generator output"
-./run_demo.sh -i386 --out run_32.log "${nac3args[@]}" "$demo"
-diff -Nau interpreted.log run_32.log
+if [ -n "$i686" ]; then
+  echo "...... Trying NAC3's 32-bit code generator output"
+  ./run_demo.sh -i686 --out run_32.log "${nac3args[@]}" "$demo"
+  diff -Nau interpreted.log run_32.log
+fi
 
 echo "...... Trying NAC3's 64-bit code generator output"
 ./run_demo.sh --out run_64.log "${nac3args[@]}" "$demo"
@@ -31,4 +54,4 @@ diff -Nau interpreted.log run_64.log
 echo "...... OK"
 
 rm -f interpreted.log \
-  run_32.log run_64.log
\ No newline at end of file
+  run_32.log run_64.log
diff --git a/nac3standalone/demo/run_demo.sh b/nac3standalone/demo/run_demo.sh
index a71c22e4..298024f5 100755
--- a/nac3standalone/demo/run_demo.sh
+++ b/nac3standalone/demo/run_demo.sh
@@ -2,6 +2,9 @@
 
 set -e
 
+: "${DEMO_LINALG_STUB:=linalg/target/release/liblinalg.a}"
+: "${DEMO_LINALG_STUB32:=linalg/target/i686-unknown-linux-gnu/release/liblinalg.a}"
+
 if [ -z "$1" ]; then
     echo "No argument supplied"
     exit 1
@@ -11,7 +14,7 @@ declare -a nac3args
 while [ $# -ge 1 ]; do
   case "$1" in
     --help)
-      echo "Usage: run_demo.sh [--help] [--out OUTFILE] [--debug] [-i386] -- [NAC3ARGS...]"
+      echo "Usage: run_demo.sh [--help] [--out OUTFILE] [--debug] [-i686] -- [NAC3ARGS...]"
       exit
       ;;
     --out)
@@ -21,8 +24,8 @@ while [ $# -ge 1 ]; do
     --debug)
       debug=1
       ;;
-    -i386)
-      i386=1
+    -i686)
+      i686=1
       ;;
     --)
       shift
@@ -51,20 +54,14 @@ fi
 
 rm -f ./*.o ./*.bc demo
 
-if [ -z "$i386" ]; then
+if [ -z "$i686" ]; then
   $nac3standalone "${nac3args[@]}"
-
-  cd linalg && cargo build --release --target x86_64-unknown-linux-gnu -q && cd ..
   clang -c -std=gnu11 -Wall -Wextra -O3 -o demo.o demo.c
-  clang -lm -Wl,--no-warn-search-mismatch -o demo module.o demo.o linalg/target/x86_64-unknown-linux-gnu/release/liblinalg.a
+  clang -o demo module.o demo.o $DEMO_LINALG_STUB -lm -Wl,--no-warn-search-mismatch
 else
-   # Enable SSE2 to avoid rounding errors with X87's 80-bit fp precision computations
-
-   $nac3standalone --triple i386-pc-linux-gnu --target-features +sse2 "${nac3args[@]}"
-   
-  cd linalg && cargo build --release --target i686-unknown-linux-gnu -q && cd ..
-   clang -m32 -c -std=gnu11 -Wall -Wextra -O3 -msse2 -o demo.o demo.c 
-   clang -m32 -lm -Wl,--no-warn-search-mismatch -o demo module.o demo.o linalg/target/i686-unknown-linux-gnu/release/liblinalg.a
+  $nac3standalone --triple i686-unknown-linux-gnu "${nac3args[@]}"
+  clang -m32 -c -std=gnu11 -Wall -Wextra -O3 -msse2 -o demo.o demo.c
+  clang -m32 -o demo module.o demo.o $DEMO_LINALG_STUB32 -lm -Wl,--no-warn-search-mismatch
 fi
 
 if [ -z "$outfile" ]; then