diff --git a/BIN_LOCATIONS.txt b/BIN_LOCATIONS.txt
new file mode 100644
index 0000000..e7f0c6f
--- /dev/null
+++ b/BIN_LOCATIONS.txt
@@ -0,0 +1,22 @@
+/store/bin
+/store/gnu/bin
+/usr/bin
+/usr/local/bin
+/local/bin
+/opt/bin
+/opt/local/bin
+/sbin
+/usr/sbin
+/usr/local/sbin
+/opt/sbin
+/var/qmail/bin
+/usr/drwho/local/bin
+/usr/local/mlog3/bin
+/usr/local/flite/bin
+/opt/flite/bin
+/opt/csw/bin
+/sw/bin
+/usr/sfw/bin
+/perl/bin
+/usr/local/php/bin
+/usr/X11R6/bin
diff --git a/run.sh b/run.sh
index 9f5522c..620e163 100755
--- a/run.sh
+++ b/run.sh
@@ -73,25 +73,32 @@ fi
 
 cat "$OUTPUT_DIR/php-libs.txt" | sort | uniq -c | sort -gr > "$OUTPUT_DIR/php-libs-overview.txt"
 
-find \
-  /home/pvv/?/*/web-docs \
-  -type f \
-  \( \
-       -name '*.cgi' \
-    -o -name '*.php' \
-    -o -name '*.php3' \
-    -o -name '*.pm' \
-    -o -name '*.pl' \
-    -o -name '*.sh' \
-    -o -name '*.bash' \
-    -o -name '*.phtml' \
-    -o -name '*.shtml' \
-    -o -name '*.lisp' \
-    -o -name '*.cl' \
-  \) \
-  -exec rg '(?:/store/bin|/store/gnu/bin|/usr/bin|/usr/local/bin|/local/bin|/opt/bin|/opt/local/bin|/sbin|/usr/sbin|/usr/local/sbin|/opt/sbin|/var/qmail/bin|/usr/drwho/local/bin|/usr/local/mlog3/bin|/usr/local/flite/bin|/opt/flite/bin|/opt/csw/bin|/sw/bin|/usr/sfw/bin|/perl/bin|/usr/local/php/bin|/usr/X11R6/bin)/(?:env\s*)?(\w+(?:/\w+)*)' {} -N -o -r '$1' \; \
-  2>/dev/null \
-  | tee "$OUTPUT_DIR/cgi-progs.txt"
+if [[ ! -f "$OUTPUT_DIR/cgi-progs.txt" ]]; then
+  readarray -t BIN_LOCATIONS < BIN_LOCATIONS.txt
+  bin_locations_regex=$(printf '|%s' "${BIN_LOCATIONS[@]}")
+  bin_locations_regex="${bin_locations_regex:1}"  # remove leading '|'
+  bin_locations_regex="(?:${bin_locations_regex})"
+
+  find \
+    /home/pvv/?/*/web-docs \
+    -type f \
+    \( \
+         -name '*.cgi' \
+      -o -name '*.php' \
+      -o -name '*.php3' \
+      -o -name '*.pm' \
+      -o -name '*.pl' \
+      -o -name '*.sh' \
+      -o -name '*.bash' \
+      -o -name '*.phtml' \
+      -o -name '*.shtml' \
+      -o -name '*.lisp' \
+      -o -name '*.cl' \
+    \) \
+    -exec rg "$bin_locations_regex/(?:env\s*)?(\w+(?:/\w+)*)" {} -N -o -r '$1' \; \
+    2>/dev/null \
+    | tee "$OUTPUT_DIR/cgi-progs.txt"
+fi
 
 cat "$OUTPUT_DIR/cgi-progs.txt" | sort | uniq -c | sort -gr > "$OUTPUT_DIR/cgi-progs-overview.txt"