diff -Nru dolfin-1.6.0/debian/changelog dolfin-1.6.0/debian/changelog
--- dolfin-1.6.0/debian/changelog	2016-04-26 16:03:29.000000000 +0000
+++ dolfin-1.6.0/debian/changelog	2016-06-07 01:13:15.000000000 +0000
@@ -1,3 +1,11 @@
+dolfin (1.6.0-5) unstable; urgency=medium
+
+  * Depends: libpetsc3.6-dev rather than petsc-dev.
+    Likewise libslepc3.6-dev.
+    dolfin 1.6 is not compatible with petsc 3.7.
+
+ -- Drew Parsons <dparsons@debian.org>  Tue, 07 Jun 2016 09:11:42 +0800
+
 dolfin (1.6.0-4) unstable; urgency=medium
 
   [ Mattia Rizzolo ]
diff -Nru dolfin-1.6.0/debian/control dolfin-1.6.0/debian/control
--- dolfin-1.6.0/debian/control	2016-04-26 16:03:29.000000000 +0000
+++ dolfin-1.6.0/debian/control	2016-06-07 01:13:15.000000000 +0000
@@ -28,13 +28,13 @@
  libvtk6-dev,
  libxml2-dev,
  mpi-default-dev,
- petsc-dev [!kfreebsd-amd64 !kfreebsd-i386],
+ libpetsc3.6-dev (>= 3.6.4.dfsg1-2) [!kfreebsd-amd64 !kfreebsd-i386],
+ libslepc3.6-dev (>= 3.6.3.dfsg1-6) [!kfreebsd-amd64 !kfreebsd-i386],
  pkg-config,
  python-dev,
  python-ffc (>= 1.6.0),
  python-numpy,
  python-ply,
- slepc-dev [!kfreebsd-amd64 !kfreebsd-i386],
  swig3.0 (>= 3.0.3)
 Standards-Version: 3.9.8
 X-Python-Version: >= 2.7
@@ -64,9 +64,9 @@
  libscotch-dev,
  libvtk6-dev,
  libxml2-dev,
- petsc-dev [!kfreebsd-amd64 !kfreebsd-i386],
+ libpetsc3.6-dev [!kfreebsd-amd64 !kfreebsd-i386],
+ libslepc3.6-dev [!kfreebsd-amd64 !kfreebsd-i386],
  pkg-config,
- slepc-dev [!kfreebsd-amd64 !kfreebsd-i386],
  ${misc:Depends}
 Conflicts:
  libdolfin0-dev,
diff -Nru dolfin-1.6.0/debian/rules dolfin-1.6.0/debian/rules
--- dolfin-1.6.0/debian/rules	2016-04-26 16:03:29.000000000 +0000
+++ dolfin-1.6.0/debian/rules	2016-06-07 01:13:15.000000000 +0000
@@ -20,6 +20,11 @@
 PYVERS := $(shell pyversions --requested debian/control | tac -s' ')
 DEFAULT_PYVER := $(shell pyversions -d)
 
+PETSC_VERSION=3.6
+PETSC_DIR=/usr/lib/petscdir/$(PETSC_VERSION)-real
+# SLEPc version must match PETSc
+SLEPSC_DIR=/usr/lib/slepcdir/$(PETSC_VERSION)-real
+
 CMAKE_OPTS := \
 	-D CMAKE_BUILD_TYPE:STRING=RelWithDebInfo \
 	-D BUILD_SHARED_LIBS:BOOL=ON \
@@ -41,8 +46,8 @@
 	-D DOLFIN_ENABLE_UNIT_TESTS:BOOL=OFF \
 	-D SWIG_EXECUTABLE:FILEPATH=/usr/bin/swig \
 	-D DOLFIN_ENABLE_MPI:BOOL=$(ENABLE_MPI) \
-	-D PETSC_DIR:PATH=/usr/lib/petsc \
-	-D SLEPC_DIR:PATH=/usr/lib/slepc \
+	-D PETSC_DIR:PATH=$(PETSC_DIR) \
+	-D SLEPC_DIR:PATH=$(SLEPSC_DIR) \
 	-D DOLFIN_LIB_DIR:PATH=lib/$(DEB_BUILD_MULTIARCH) \
 	-D DOLFIN_PKGCONFIG_DIR:PATH=lib/$(DEB_BUILD_MULTIARCH)/pkgconfig \
 	$(DOLFIN_HOME)