2 files changed, 4 insertions, 2 deletions

diff --git a/INSTALL.md b/INSTALL.md
index 343ee0a..7c978f9 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -67,13 +67,15 @@ using this method.
 
 ### Stack-based Windows build
 
+1) > cd packages\base
+
 1) > stack setup
 
 2) Download and unzip somewhere OpenBLAS http://www.openblas.net/
 
 3) In a normal Windows cmd:
 
-     > stack install --extra-lib-dirs=C:\...\OpenBLAS\lib --extra-include-dir=C:\...\OpenBLAS\include
+     > stack install --flag hmatrix:openblas --extra-lib-dirs=C:\...\OpenBLAS\lib --extra-include-dir=C:\...\OpenBLAS\include
          
 ## Tests ###############################################
 
diff --git a/packages/base/stack.yaml b/packages/base/stack.yaml
index e6304de..f4001c6 100644
--- a/packages/base/stack.yaml
+++ b/packages/base/stack.yaml
@@ -1,6 +1,6 @@
 flags:
   hmatrix:
-    openblas: true
+    openblas: false
 packages:
 - '.'
 extra-deps: []