diff --git a/.github/workflows/cibuildwheel.yml b/.github/workflows/cibuildwheel.yml
index d755dc1..6c934eb 100644
--- a/.github/workflows/cibuildwheel.yml
+++ b/.github/workflows/cibuildwheel.yml
@@ -22,14 +22,16 @@ jobs:
         with:
           python-version: "3.11"
 
-      - name: Install cibuildwheel and build dependencies
-              run: |
-                python -m pip install --upgrade pip
-                # Install these on the host so cibuildwheel can resolve the paths
-                python -m pip install cibuildwheel scipy-openblas delvewheel
+      - name: Install cibuildwheel
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install cibuildwheel
 
-      - name: Build wheels
-        run: python -m cibuildwheel --output-dir wheelhouse        
+      - name: Install Windows build dependencies
+        if: runner.os == 'Windows'
+        run: |
+          # Install these on the host so cibuildwheel can resolve the paths
+          python -m pip install scipy-openblas64 delvewheel
 
       - name: Build wheels
         run: python -m cibuildwheel --output-dir wheelhouse
diff --git a/_codeql_detected_source_root b/_codeql_detected_source_root
new file mode 120000
index 0000000..945c9b4
--- /dev/null
+++ b/_codeql_detected_source_root
@@ -0,0 +1 @@
+.
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index f87603b..b8a6ba7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,14 +27,13 @@ environment = { EASYSBA_USE_ACCELERATE = "1", EASYSBA_LAPACK_LIBS = "" }
 [tool.cibuildwheel.windows]
 # We already installed these on the host, but we install them in the 
 # build venv as well to be safe for the repair step.
-before-build = "pip install scipy-openblas delvewheel"
+before-build = "pip install scipy-openblas64 delvewheel"
+# Use the repair-wheel-command to bundle the DLL
+repair-wheel-command = "python -c \"import scipy_openblas64, subprocess, sys; subprocess.check_call(['delvewheel', 'repair', '--add-path', scipy_openblas64.get_lib_dir(), '-w', sys.argv[1], sys.argv[2]])\" {dest_dir} {wheel}"
 
 [tool.cibuildwheel.windows.environment]
-EASYSBA_LAPACK_LIBS = "openblas"
-# These $(...) commands will now work because scipy-openblas is on the host
-INCLUDE = "$(python -c \"import scipy_openblas; print(scipy_openblas.get_include_dir())\");$INCLUDE"
-LIB = "$(python -c \"import scipy_openblas; print(scipy_openblas.get_lib_dir())\");$LIB"
-
-[tool.cibuildwheel.windows.repair-wheel-command]
-# Use the repair-wheel-command to bundle the DLL
-repair-wheel-command = "python -c \"import scipy_openblas, subprocess, sys; subprocess.check_call(['delvewheel', 'repair', '--add-path', scipy_openblas.get_lib_dir(), '-w', sys.argv[1], sys.argv[2]])\" {dest_dir} {wheel}"
+EASYSBA_LAPACK_LIBS = "libscipy_openblas64_"
+# Only add the library directory for linking. Do NOT add include directory
+# to avoid conflicts with scipy-openblas64's lapack.h (has C99 complex types
+# incompatible with MSVC). The project has its own lapack_compat.h header.
+LIB = "$(python -c \"import scipy_openblas64; print(scipy_openblas64.get_lib_dir())\");$LIB"
diff --git a/src/lapack_compat.h b/src/lapack_compat.h
index 0764245..ad74bb6 100644
--- a/src/lapack_compat.h
+++ b/src/lapack_compat.h
@@ -7,48 +7,53 @@ extern "C" {
 
 typedef int lapack_int;
 
+// On Windows with scipy-openblas64, symbols have scipy_ prefix and 64_ suffix
+#if defined(_WIN32) || defined(_WIN64)
+#define FORTRAN_WRAPPER(name) scipy_##name##64_
+#else
 #define FORTRAN_WRAPPER(name) name##_
+#endif
 
-void dgeqrf_(const lapack_int *m, const lapack_int *n, double *a,
+void FORTRAN_WRAPPER(dgeqrf)(const lapack_int *m, const lapack_int *n, double *a,
              const lapack_int *lda, double *tau, double *work,
              const lapack_int *lwork, lapack_int *info);
-void dorgqr_(const lapack_int *m, const lapack_int *n, const lapack_int *k,
+void FORTRAN_WRAPPER(dorgqr)(const lapack_int *m, const lapack_int *n, const lapack_int *k,
              double *a, const lapack_int *lda, const double *tau,
              double *work, const lapack_int *lwork, lapack_int *info);
-void dtrtrs_(const char *uplo, const char *trans, const char *diag,
+void FORTRAN_WRAPPER(dtrtrs)(const char *uplo, const char *trans, const char *diag,
              const lapack_int *n, const lapack_int *nrhs, const double *a,
              const lapack_int *lda, double *b, const lapack_int *ldb,
              lapack_int *info);
-void dpotrf_(const char *uplo, const lapack_int *n, double *a,
+void FORTRAN_WRAPPER(dpotrf)(const char *uplo, const lapack_int *n, double *a,
              const lapack_int *lda, lapack_int *info);
-void dpotrs_(const char *uplo, const lapack_int *n, const lapack_int *nrhs,
+void FORTRAN_WRAPPER(dpotrs)(const char *uplo, const lapack_int *n, const lapack_int *nrhs,
              const double *a, const lapack_int *lda, double *b,
              const lapack_int *ldb, lapack_int *info);
-void dgetrf_(const lapack_int *m, const lapack_int *n, double *a,
+void FORTRAN_WRAPPER(dgetrf)(const lapack_int *m, const lapack_int *n, double *a,
              const lapack_int *lda, lapack_int *ipiv, lapack_int *info);
-void dgetrs_(const char *trans, const lapack_int *n, const lapack_int *nrhs,
+void FORTRAN_WRAPPER(dgetrs)(const char *trans, const lapack_int *n, const lapack_int *nrhs,
              const double *a, const lapack_int *lda, const lapack_int *ipiv,
              double *b, const lapack_int *ldb, lapack_int *info);
-void dgetri_(const lapack_int *n, double *a, const lapack_int *lda,
+void FORTRAN_WRAPPER(dgetri)(const lapack_int *n, double *a, const lapack_int *lda,
              const lapack_int *ipiv, double *work, const lapack_int *lwork,
              lapack_int *info);
-void dgesdd_(const char *jobz, const lapack_int *m, const lapack_int *n,
+void FORTRAN_WRAPPER(dgesdd)(const char *jobz, const lapack_int *m, const lapack_int *n,
              double *a, const lapack_int *lda, double *s, double *u,
              const lapack_int *ldu, double *vt, const lapack_int *ldvt,
              double *work, const lapack_int *lwork, lapack_int *iwork,
              lapack_int *info);
-void dsytrf_(const char *uplo, const lapack_int *n, double *a,
+void FORTRAN_WRAPPER(dsytrf)(const char *uplo, const lapack_int *n, double *a,
              const lapack_int *lda, lapack_int *ipiv, double *work,
              const lapack_int *lwork, lapack_int *info);
-void dsytrs_(const char *uplo, const lapack_int *n, const lapack_int *nrhs,
+void FORTRAN_WRAPPER(dsytrs)(const char *uplo, const lapack_int *n, const lapack_int *nrhs,
              const double *a, const lapack_int *lda, const lapack_int *ipiv,
              double *b, const lapack_int *ldb, lapack_int *info);
-void dsytri_(const char *uplo, const lapack_int *n, double *a,
+void FORTRAN_WRAPPER(dsytri)(const char *uplo, const lapack_int *n, double *a,
              const lapack_int *lda, const lapack_int *ipiv, double *work,
              lapack_int *info);
-void dpotf2_(const char *uplo, const lapack_int *n, double *a,
+void FORTRAN_WRAPPER(dpotf2)(const char *uplo, const lapack_int *n, double *a,
              const lapack_int *lda, lapack_int *info);
-void dpotri_(const char *uplo, const lapack_int *n, double *a,
+void FORTRAN_WRAPPER(dpotri)(const char *uplo, const lapack_int *n, double *a,
              const lapack_int *lda, lapack_int *info);
 
 #ifdef __cplusplus