diff --git a/.gitignore b/.gitignore
index 39ce3cf0..96cf762e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,5 @@
 build-*
 *.user
 *.user.*
-installer/setupvars.iss
-installer/Output
-custom.pri
\ No newline at end of file
+custom.pri
+env.pri
diff --git a/mayo.pro b/mayo.pro
index a37f5e4f..e9f28f0d 100644
--- a/mayo.pro
+++ b/mayo.pro
@@ -116,6 +116,11 @@ OTHER_FILES += \
     images/credits.txt \
     scripts/bump-version.rb \
 
+# Optional developer-specific QMake pri file for environment related settings
+exists($$PWD/env.pri) {
+    include($$PWD/env.pri)
+}
+
 # OpenCascade
 include(opencascade.pri)
 !isEmpty(OCC_VERSION_STR) {
@@ -220,7 +225,7 @@ CONFIG(withtests) {
     DEFINES += MAYO_WITH_TESTS
 }
 
-# Developer custom processing
+# Optional developer-specific QMake pri file for custom processing
 exists($$PWD/custom.pri) {
     include($$PWD/custom.pri)
 }