diff --git a/external/external_build.cmake b/external/external_build.cmake
index 4378d42..59b4bfb 100644
--- a/external/external_build.cmake
+++ b/external/external_build.cmake
@@ -351,7 +351,7 @@ ExternalProject_Add(healpix
     PREFIX ${BUILD_PREFIX}/healpix-prefix
     URL ${HEALPIX_URL}
     URL_HASH SHA256=8876c18efc596fd706b2a004ac15f2fb60b795f2db6fbabea9d8ccf549531dda
-    CONFIGURE_COMMAND ./configure --auto=cxx
+    CONFIGURE_COMMAND ${CMAKE_COMMAND} -E env FITSDIR=${EXT_INSTALL}/lib FITSINC=${EXT_INSTALL}/include  ./configure --auto=cxx
     BUILD_IN_SOURCE 1
     BUILD_BYPRODUCTS ${HEALPIX_DIR}/lib/libhealpix_cxx.a
     INSTALL_COMMAND true
@@ -383,6 +383,7 @@ if (INTERNAL_QHULL)
       -DCMAKE_INSTALL_PREFIX=${CMAKE_BINARY_DIR}/ext_build/qhull
       -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
       -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
+      -DCMAKE_POLICY_VERSION_MINIMUM=3.5
 
   )
   SET(QHULL_DIR ${CMAKE_BINARY_DIR}/ext_build/qhull)
diff --git a/external/external_cosmotool.cmake b/external/external_cosmotool.cmake
index 4940d7c..f758938 100644
--- a/external/external_cosmotool.cmake
+++ b/external/external_cosmotool.cmake
@@ -10,7 +10,7 @@ ENDIF()
 
   #v1.0.0a7.tar.bz2
 ExternalProject_Add(cosmotool
-  URL https://git.aquila-consortium.org/guilhem_lavaux/cosmotool/archive/63158017ea7b693cf2b8b2f840e24fb1f6882558.tar.gz
+  URL https://git.aquila-consortium.org/guilhem_lavaux/cosmotool/archive/ee8f4c3135c0ae8e4a421df8dd3ea832d8724542.tar.gz
   DEPENDS ${cosmotool_DEPS}
   SOURCE_DIR ${COSMOTOOL_DIR}
   PREFIX ${BUILD_PREFIX}/cosmotool-prefix