Make conda more relocatable

Makefile

-all: ${HOME}/miniconda3/envs/data metadata build
+CONDA_ROOT := $(realpath $(CONDA_EXE)/../..)
 
-${HOME}/miniconda3:
-	@echo Please install miniconda to ${HOME}/miniconda3
-	@exit 1
+all: ${CONDA_ROOT}/envs/data metadata build
 
-${HOME}/miniconda3/envs/data: ${HOME}/miniconda3 environment.yml
+.PHONY: miniconda-installed
+miniconda-installed:
+	@[ "${CONDA_ROOT}" != "/" ] || (echo "Please install miniconda"; exit 1)
+
+${CONDA_ROOT}/envs/data: miniconda-installed environment.yml
 	conda env update
 	touch $@
 
@@ -22,7 +24,7 @@ test:
 
 .PHONY: conda-active
 conda-active: ${HOME}/miniconda3/envs/data
-	@[ "${CONDA_PREFIX}" = "${HOME}/miniconda3/envs/data" ] || conda activate data
+	@[ "${CONDA_PREFIX}" = "${CONDA_ROOT}/envs/data" ] || conda activate data
 
 dev: conda-active
 	for dir in shared/{schema,workspaces,channels} services/{workflow,capability} apps/cli/utilities/wf_monitor; do \