diff --git a/Makefile b/Makefile
index 6c3e219..ef9415b 100644
--- a/Makefile
+++ b/Makefile
@@ -11,7 +11,6 @@ PYP_DIR = src/py
 # Generate and install developmet versions of the extension
 # and python package.
 # The extension is named 'dev' with a 'current' alias for easily upgrading.
-# The Python package is installed in a virtual environment envs/dev/
 # Requires sudo.
 install: ## Generate and install development version of the extension; requires sudo.
 	$(MAKE) -C $(PYP_DIR) install
@@ -29,7 +28,6 @@ release: ## Generate a new release of the extension. Only for telease manager
 	$(MAKE) -C $(PYP_DIR) release
 
 # Install the current release.
-# The Python package is installed in a virtual environment envs/X.Y.Z/
 # Requires sudo.
 # Use the RELEASE_VERSION environment variable to deploy a specific version:
 #     sudo make deploy RELEASE_VERSION=1.0.0
@@ -52,10 +50,6 @@ clean-release: ## clean up current release
 	rm -rf release/python/$(RELEASE_VERSION)
 	rm -f release/$(RELEASE_VERSION)--*.sql
 
-# Cleanup all virtual environments
-clean-environments: ## clean up all virtual environments
-	rm -rf envs/*
-
 clean-all: clean-dev clean-release clean-environments
 
 help:
diff --git a/src/pg/Makefile b/src/pg/Makefile
index 8a745c4..178ed08 100644
--- a/src/pg/Makefile
+++ b/src/pg/Makefile
@@ -7,7 +7,6 @@ include ../../Makefile.global
 #   requires sudo. In additionof the current development version
 #   named 'dev', an alias 'current' is generating for ease of
 #   update (upgrade to 'current', then to 'dev').
-#   the python module is installed in a virtualenv in envs/dev/
 # * test runs the tests for the currently generated Development
 #   extension.
 
@@ -18,11 +17,8 @@ DATA         = $(EXTENSION)--dev.sql \
 SOURCES_DATA_DIR = sql
 SOURCES_DATA = $(wildcard $(SOURCES_DATA_DIR)/*.sql)
 
-VIRTUALENV_PATH = $(realpath ../../envs)
-ESC_VIRVIRTUALENV_PATH = $(subst /,\/,$(VIRTUALENV_PATH))
 
-REPLACEMENTS = -e 's/@@VERSION@@/$(EXTVERSION)/g' \
-               -e 's/@@VIRTUALENV_PATH@@/$(ESC_VIRVIRTUALENV_PATH)/g'
+REPLACEMENTS = -e 's/@@VERSION@@/$(EXTVERSION)/g'
 
 $(DATA): $(SOURCES_DATA)
 	$(SED) $(REPLACEMENTS) $(SOURCES_DATA_DIR)/*.sql > $@
@@ -54,7 +50,6 @@ release: ../../release/$(EXTENSION).control $(SOURCES_DATA)
 	$(SED) $(REPLACEMENTS) $(SOURCES_DATA_DIR)/*.sql > ../../release/$(EXTENSION)--$(EXTVERSION).sql
 
 # Install the current relese into the PostgreSQL extensions directory
-# and the Python package in a virtual environment envs/X.Y.Z
 deploy:
 	$(INSTALL_DATA) ../../release/$(EXTENSION).control '$(DESTDIR)$(datadir)/extension/'
 	$(INSTALL_DATA) ../../release/*.sql '$(DESTDIR)$(datadir)/extension/'
diff --git a/src/py/Makefile b/src/py/Makefile
index 90b22b8..403c5a1 100644
--- a/src/py/Makefile
+++ b/src/py/Makefile
@@ -2,14 +2,11 @@ include ../../Makefile.global
 
 # Install the package locally for development
 install:
-	virtualenv --system-site-packages ../../envs/dev
-	# source ../../envs/dev/bin/activate
-	../../envs/dev/bin/pip install -I ./crankshaft
-	../../envs/dev/bin/pip install -I nose
+	pip install ./crankshaft
 
 # Test develpment install
 test:
-	../../envs/dev/bin/nosetests crankshaft/test/
+	nosetests crankshaft/test/
 
 release: ../../release/$(EXTENSION).control $(SOURCES_DATA)
 	mkdir -p ../../release/python/$(EXTVERSION)
@@ -17,6 +14,4 @@ release: ../../release/$(EXTENSION).control $(SOURCES_DATA)
 	$(SED) -i -r 's/version='"'"'[0-9]+\.[0-9]+\.[0-9]+'"'"'/version='"'"'$(EXTVERSION)'"'"'/g'  ../../release/python/$(EXTVERSION)/$(PACKAGE)/setup.py
 
 deploy:
-	virtualenv --system-site-packages $(VIRTUALENV_PATH)/$(RELEASE_VERSION)
-	$(VIRTUALENV_PATH)/$(RELEASE_VERSION)/bin/pip install -I -U ../../release/python/$(RELEASE_VERSION)/$(PACKAGE)
-	$(VIRTUALENV_PATH)/$(RELEASE_VERSION)/bin/pip install -I nose
+	pip install --upgrade ../../release/python/$(RELEASE_VERSION)/$(PACKAGE)