diff --git a/gnu/packages/mpi.scm b/gnu/packages/mpi.scm
index 6078186f40e7c9e5b357aa25bc2192bd9e1588e6..79ee948765157025b12d15b0df0add0eb7076bd8 100644
--- a/gnu/packages/mpi.scm
+++ b/gnu/packages/mpi.scm
@@ -177,7 +177,7 @@ (define-public openmpi
        (base32 "0ms0zvyxyy3pnx9qwib6zaljyp2b3ixny64xvq3czv3jpr8zf2wh"))))
     (build-system gnu-build-system)
     (inputs
-     `(("hwloc" ,hwloc "lib")
+     `(("hwloc" ,hwloc-2 "lib")
        ("gfortran" ,gfortran)
        ("libfabric" ,libfabric)
        ("libevent" ,libevent)
diff --git a/gnu/packages/parallel.scm b/gnu/packages/parallel.scm
index 0e47dfb2e482950a83844fb4c12a58a689e2664c..4fc2c9afb41cf05c51f8926e0793dadb0ad12b3f 100644
--- a/gnu/packages/parallel.scm
+++ b/gnu/packages/parallel.scm
@@ -139,7 +139,7 @@ (define-public slurm
    ;; in particular mysql and gtk+.
    (inputs `(("expect" ,expect)
              ("freeipmi" ,freeipmi)
-             ("hwloc" ,hwloc "lib")
+             ("hwloc" ,hwloc-2 "lib")
              ("json-c" ,json-c)
              ("linux-pam" , linux-pam)
              ("munge" ,munge)