diff --git a/mpi-hs.cabal b/mpi-hs.cabal
--- a/mpi-hs.cabal
+++ b/mpi-hs.cabal
@@ -4,10 +4,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 89b326f1e7c99cda61b1e5fd0a447e1cdbb279459215ca51e80473e789abaafb
+-- hash: f2cf4257a32103f47022facfd6a094ae6a3b6fc48338053b6afeb7fc7ec6dc5f
 
 name:           mpi-hs
-version:        0.7.1.0
+version:        0.7.1.2
 synopsis:       MPI bindings for Haskell
 description:    MPI (the [Message Passinag Interface](https://www.mpi-forum.org)) is
                 a widely used standard for distributed-memory programming on HPC
@@ -118,6 +118,7 @@
         /usr/include/mpich
         /usr/include/x86_64-linux-gnu/mpich
     extra-lib-dirs:
+        /usr/lib/x86_64-linux-gnu
         /usr/lib/x86_64-linux-gnu/lib
     extra-libraries:
         mpich
@@ -169,6 +170,7 @@
                     /usr/include/mpich
                     /usr/include/x86_64-linux-gnu/mpich
                 extra-lib-dirs:
+                    /usr/lib/x86_64-linux-gnu
                     /usr/lib/x86_64-linux-gnu/lib
                 extra-libraries:
                     mpich
@@ -189,6 +191,7 @@
         /usr/include/mpich
         /usr/include/x86_64-linux-gnu/mpich
     extra-lib-dirs:
+        /usr/lib/x86_64-linux-gnu
         /usr/lib/x86_64-linux-gnu/lib
     extra-libraries:
         mpich
@@ -240,6 +243,7 @@
                     /usr/include/mpich
                     /usr/include/x86_64-linux-gnu/mpich
                 extra-lib-dirs:
+                    /usr/lib/x86_64-linux-gnu
                     /usr/lib/x86_64-linux-gnu/lib
                 extra-libraries:
                     mpich
@@ -260,6 +264,7 @@
         /usr/include/mpich
         /usr/include/x86_64-linux-gnu/mpich
     extra-lib-dirs:
+        /usr/lib/x86_64-linux-gnu
         /usr/lib/x86_64-linux-gnu/lib
     extra-libraries:
         mpich
@@ -311,6 +316,7 @@
                     /usr/include/mpich
                     /usr/include/x86_64-linux-gnu/mpich
                 extra-lib-dirs:
+                    /usr/lib/x86_64-linux-gnu
                     /usr/lib/x86_64-linux-gnu/lib
                 extra-libraries:
                     mpich
@@ -331,6 +337,7 @@
         /usr/include/mpich
         /usr/include/x86_64-linux-gnu/mpich
     extra-lib-dirs:
+        /usr/lib/x86_64-linux-gnu
         /usr/lib/x86_64-linux-gnu/lib
     extra-libraries:
         mpich
@@ -382,6 +389,7 @@
                     /usr/include/mpich
                     /usr/include/x86_64-linux-gnu/mpich
                 extra-lib-dirs:
+                    /usr/lib/x86_64-linux-gnu
                     /usr/lib/x86_64-linux-gnu/lib
                 extra-libraries:
                     mpich
@@ -404,6 +412,7 @@
         /usr/include/mpich
         /usr/include/x86_64-linux-gnu/mpich
     extra-lib-dirs:
+        /usr/lib/x86_64-linux-gnu
         /usr/lib/x86_64-linux-gnu/lib
     extra-libraries:
         mpich
@@ -455,6 +464,7 @@
                     /usr/include/mpich
                     /usr/include/x86_64-linux-gnu/mpich
                 extra-lib-dirs:
+                    /usr/lib/x86_64-linux-gnu
                     /usr/lib/x86_64-linux-gnu/lib
                 extra-libraries:
                     mpich
@@ -476,6 +486,7 @@
         /usr/include/mpich
         /usr/include/x86_64-linux-gnu/mpich
     extra-lib-dirs:
+        /usr/lib/x86_64-linux-gnu
         /usr/lib/x86_64-linux-gnu/lib
     extra-libraries:
         mpich
@@ -527,6 +538,7 @@
                     /usr/include/mpich
                     /usr/include/x86_64-linux-gnu/mpich
                 extra-lib-dirs:
+                    /usr/lib/x86_64-linux-gnu
                     /usr/lib/x86_64-linux-gnu/lib
                 extra-libraries:
                     mpich
diff --git a/package.yaml b/package.yaml
--- a/package.yaml
+++ b/package.yaml
@@ -1,5 +1,5 @@
 name: mpi-hs
-version: '0.7.1.0'
+version: '0.7.1.2'
 github: "eschnett/mpi-hs"
 license: Apache-2.0
 author: "Erik Schnetter <schnetter@gmail.com>"
@@ -38,18 +38,6 @@
   is an error in this package.
 
 flags:
-  openmpi-debian:
-    description: Use OpenMPI on Debian
-    manual: true
-    default: false
-  openmpi-macports:
-    description: Use OpenMPI on MacPorts
-    manual: true
-    default: false
-  openmpi-ubuntu:
-    description: Use OpenMPI on Ubuntu
-    manual: true
-    default: false
   mpich-debian:
     description: Use MPICH on Debian
     manual: true
@@ -62,6 +50,18 @@
     description: Use MPICH on Ubuntu
     manual: true
     default: false
+  openmpi-debian:
+    description: Use OpenMPI on Debian
+    manual: true
+    default: false
+  openmpi-macports:
+    description: Use OpenMPI on MacPorts
+    manual: true
+    default: false
+  openmpi-ubuntu:
+    description: Use OpenMPI on Ubuntu
+    manual: true
+    default: false
   system-mpi:
     description: Use generic system MPI
     manual: true
@@ -98,6 +98,7 @@
       - /usr/include/mpich
       - /usr/include/x86_64-linux-gnu/mpich
     extra-lib-dirs:
+      - /usr/lib/x86_64-linux-gnu
       - /usr/lib/x86_64-linux-gnu/lib
     extra-libraries:
       - mpich
@@ -155,6 +156,7 @@
                               - /usr/include/mpich
                               - /usr/include/x86_64-linux-gnu/mpich
                             extra-lib-dirs:
+                              - /usr/lib/x86_64-linux-gnu
                               - /usr/lib/x86_64-linux-gnu/lib
                             extra-libraries:
                               - mpich
diff --git a/stack.yaml b/stack.yaml
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,5 +1,5 @@
 # Resolver to choose a 'specific' stackage snapshot or a compiler version.
-resolver: lts-15.5
+resolver: lts-15.8
 # resolver: nightly-2020-03-24
 
 # User packages to be built.
diff --git a/stack.yaml.lock b/stack.yaml.lock
--- a/stack.yaml.lock
+++ b/stack.yaml.lock
@@ -6,7 +6,7 @@
 packages: []
 snapshots:
 - completed:
-    size: 491372
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/15/5.yaml
-    sha256: 1b549cfff328040c382a70a84a2087aac8dab6d778bf92f32a93a771a1980dfc
-  original: lts-15.5
+    size: 492015
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/15/8.yaml
+    sha256: 926bc3d70249dd0ba05277ff00943c0addb35b627cb641752669e7cf771310d0
+  original: lts-15.8