Fix LAPACK detection fallback for conda environments

Author: mesonepigreco

meson.build

@@ -34,8 +34,18 @@ project('python-sscha',
     blas_dep = mkl_dep
     lapack_dep = mkl_dep
   else
-    lapack_dep = dependency('lapack', required: true)
-    blas_dep = dependency('blas', required: true)
+    lapack_dep = dependency('lapack', required: false)
+    blas_dep = dependency('blas', required: false)
+
+    if not lapack_dep.found()
+      lapack_lib = fc.find_library('lapack', required: true)
+      lapack_dep = declare_dependency(dependencies: lapack_lib)
+    endif
+
+    if not blas_dep.found()
+      blas_lib = fc.find_library('blas', required: true)
+      blas_dep = declare_dependency(dependencies: blas_lib)
+    endif
   endif
 
   # Look for the OpenMP library if it is needed for parallelization.