Use PREFIX instead of CONDA_ENV_PATH because the latter isn't defined…

… when a pkg is installed during creation of a fresh conda env.

openmpi/post-link.sh

@@ -1,16 +1,16 @@
 #!/bin/sh
 
-mkdir -p $CONDA_ENV_PATH/etc/conda/deactivate.d
-mkdir -p $CONDA_ENV_PATH/etc/conda/activate.d
-cat <<EOF > $CONDA_ENV_PATH/etc/conda/deactivate.d/openmpi.sh
+mkdir -p $PREFIX/etc/conda/deactivate.d
+mkdir -p $PREFIX/etc/conda/activate.d
+cat <<EOF > $PREFIX/etc/conda/deactivate.d/openmpi.sh
 echo unsetting OPAL_PREFIX
 export OPAL_PREFIX=$OPAL_PREFIX_OLD
 unset OPAL_PREFIX_OLD
 EOF
-cat <<EOF > $CONDA_ENV_PATH/etc/conda/activate.d/openmpi.sh
+cat <<EOF > $PREFIX/etc/conda/activate.d/openmpi.sh
 #!/bin/sh
-echo setting OPAL_PREFIX to $CONDA_ENV_PATH
+echo setting OPAL_PREFIX to $PREFIX
 export OPAL_PREFIX_OLD=$OPAL_PREFIX
-export OPAL_PREFIX=$CONDA_ENV_PATH
+export OPAL_PREFIX=$PREFIX
 EOF
 

openmpi/pre-unlink.sh

@@ -1,4 +1,4 @@
 #!/bin/sh
 
-rm -f $CONDA_ENV_PATH/etc/conda/deactivate.d/openmpi.sh
-rm -f $CONDA_ENV_PATH/etc/conda/activate.d/openmpi.sh
+rm -f $PREFIX/etc/conda/deactivate.d/openmpi.sh
+rm -f $PREFIX/etc/conda/activate.d/openmpi.sh