diff --git a/IV/Makefile b/IV/Makefile
index 690439f..7b4717d 100644
--- a/IV/Makefile
+++ b/IV/Makefile
@@ -5,6 +5,12 @@ SLIDES = slides-2021-03-29.pdf
 NON_ARCHIVABLES = notes.txt referatui.txt slides-2021-03-29.txt
 ARCHIVABLES = $(filter-out $(NON_ARCHIVABLES),$(shell git ls-files .))
 
+ifeq ($(shell git rev-parse --is-inside-git-dir),true)
+GIT_DEP=$(shell git rev-parse --show-toplevel)/.git
+else
+GIT_DEP=
+endif
+
 .PHONY: test
 test: tests.sql .faux.db
 	./db -f tests.sql
@@ -64,7 +70,7 @@ $(SOURCE):
 	wget http://download.geofabrik.de/europe/$@
 
 REF = $(shell git describe --abbrev=12 --always --dirty)
-version.tex: Makefile $(shell git rev-parse --show-toplevel)/.git
+version.tex: Makefile $(GIT_DEP)
 	( \
 		TZ=UTC date '+\gdef\VCDescribe{%F ($(REF))}%'; \
 	) > $@
diff --git a/IV/extract-and-generate b/IV/extract-and-generate
index 2d97d49..e78656e 100755
--- a/IV/extract-and-generate
+++ b/IV/extract-and-generate
@@ -1,19 +1,15 @@
 #!/bin/bash
 set -euo pipefail
 
-fail() {
-    >&2 echo "$1"
-    exit 1
-}
-
 dir=$(mktemp -d)
+fname=mj-msc-all.pdf
 
-echo "Extracting all files from the report ..."
-pdfdetach -saveall -o "$dir" mj-msc-all.pdf
+echo "Extracting all files from the report to $dir ..."
+pdfdetach -saveall -o "$dir" "$fname"
 
-echo "Re-generating the report..."
+echo "Generating $dir/$fname..."
 fail=0
-make -C "$dir" -j $(nproc) mj-msc-all.pdf 2>&1 > make.log || fail=1
+make -C "$dir" -j $(nproc) "$fname" > "$dir/make.log" 2>&1 || fail=1
 
 if [[ $fail == 1 ]]; then
     >&2 echo "Generation failed. Here are the last 10 log lines:"
@@ -22,7 +18,10 @@ if [[ $fail == 1 ]]; then
 fi
 
 open=open
-if [[ $(uname) == Linux ]]
-    open=xdg-open
-fi
-"$open" "$dir/mj-msc-all.pdf"
+[[ $(uname) == Linux ]] && open=xdg-open
+
+echo "Opening $dir/$fname ..."
+"$open" "$dir/$fname"
+
+echo "Editor has been closed. Removing $dir"
+rm -fr "$dir"