diff --git a/dev/gammalib-activate.sh b/dev/gammalib-activate.sh
new file mode 100644
index 0000000..9ba0e17
--- /dev/null
+++ b/dev/gammalib-activate.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+export GAMMALIB=${CONDA_PREFIX}
+
diff --git a/dev/gammalib-deactivate.sh b/dev/gammalib-deactivate.sh
new file mode 100644
index 0000000..4b87f80
--- /dev/null
+++ b/dev/gammalib-deactivate.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+unset GAMMALIB