diff --git a/makefiles/targets.mk b/makefiles/targets.mk
index de16dbb..e82045b 100644
--- a/makefiles/targets.mk
+++ b/makefiles/targets.mk
@@ -57,6 +57,10 @@ warn-jobs:
 		fi; \
 	fi
 
+nimbus-build-system-paths:
+	echo "Creating nimbus-build-system.paths"; \
+	"$(CURDIR)/$(BUILD_SYSTEM_DIR)/scripts/create_nbs_paths.sh"
+
 deps-common: | sanity-checks warn-update warn-jobs $(NIMBLE_DIR)
 # - don't build our Nim target if it's not going to be used
 ifeq ($(USE_SYSTEM_NIM), 0)
@@ -99,7 +103,7 @@ update-test:
 #- deletes the ".nimble" dir and executes the "deps" target
 #- allows parallel building with the '+' prefix
 #- rebuilds the Nim compiler if the corresponding submodule is updated
-update-common: | sanity-checks update-test
+update-common: | sanity-checks update-test nimbus-build-system-paths
 	git submodule foreach --quiet 'git ls-files --exclude-standard --recurse-submodules -z -- ":!:.*" | xargs -0 rm -rf'
 	git submodule update --init --recursive || true
 	# changing URLs in a submodule's submodule means we have to sync and update twice
diff --git a/scripts/create_nbs_paths.sh b/scripts/create_nbs_paths.sh
new file mode 100755
index 0000000..f463ad4
--- /dev/null
+++ b/scripts/create_nbs_paths.sh
@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+cd "${ABS_PATH}/../../.."
+
+echo "--noNimblePath" > nimbus-build-system.paths
+for file in $(ls -d $PWD/vendor/*)
+do
+  if uname | grep -qiE "mingw|msys"; then
+    file=$(cygpath -m $file)
+  fi
+  if [ -d "$file/src" ]; then
+    echo --path:"\"$file/src\""
+  else
+    echo --path:"\"$file\""
+  fi
+done >> nimbus-build-system.paths
diff --git a/scripts/env.sh b/scripts/env.sh
index 331d904..9e9b2d1 100755
--- a/scripts/env.sh
+++ b/scripts/env.sh
@@ -67,18 +67,6 @@ add_submodule() {
 $EXPORT_FUNC add_submodule
 
 export NIMBUS_BUILD_SYSTEM=yes
-echo "--noNimblePath" > nimbus-build-system.paths
-for file in $(ls -d $PWD/vendor/*)
-do
-  if uname | grep -qiE "mingw|msys"; then
-    file=$(cygpath -m $file)
-  fi
-  if [ -d "$file/src" ]; then
-    echo --path:"\"$file/src\""
-  else
-    echo --path:"\"$file\""
-  fi
-done >> nimbus-build-system.paths
 
 if [[ $# == 1 && $1 == "bash" ]]; then
 	# the only way to change PS1 in a child shell, apparently