diff --git a/gis/qgis3/Portfile b/gis/qgis3/Portfile
index a391787c1f2bb..226b8323839d8 100644
--- a/gis/qgis3/Portfile
+++ b/gis/qgis3/Portfile
@@ -32,6 +32,8 @@ if {${subport} eq ${name}} {
     checksums       rmd160  4f4abd2b50ece1e094f27d6fd4c4cb5c38fb944d \
                     sha256  4c2fd5d44b95d861ffbb8ded8724ad38b49d601ccd27fa38457f6127cfc6c87b \
                     size    199052249
+
+    set grass_utils_file grass_utils.py
 } else {
     # LTR version
     github.setup    qgis QGIS 3_34_4 final-
@@ -42,6 +44,8 @@ if {${subport} eq ${name}} {
     checksums       rmd160  0730bdf3e121a185224f4602124f5a359ea6c8ac \
                     sha256  890526e82dca56ad39574b414dfb516438bea739076d49f37cb0b3fa6f1abd5f \
                     size    196392186
+
+    set grass_utils_file Grass7Utils.py
 }
 
 version             [string map {_ .} ${github.version}]
@@ -193,7 +197,7 @@ variant grass7 conflicts grass description "Build GRASS 7 plugin" {
     }
     post-patch {
         reinplace "s|command = None|command = '${prefix}/bin/grass${grass_version}'|g" \
-            ${worksrcpath}/python/plugins/grassprovider/grass_utils.py
+            ${worksrcpath}/python/plugins/grassprovider/${grass_utils_file}
     }
 }
 
@@ -207,7 +211,7 @@ variant grass conflicts grass7 description "Build GRASS (latest) plugin" {
     }
     post-patch {
         reinplace "s|command = None|command = '${prefix}/bin/grass'|g" \
-            ${worksrcpath}/python/plugins/grassprovider/grass_utils.py
+            ${worksrcpath}/python/plugins/grassprovider/${grass_utils_file}
     }
 }