diff --git a/.github/workflows/node-sass.yml b/.github/workflows/node-sass.yml
index fb4d4944c0..d83e3e70f7 100644
--- a/.github/workflows/node-sass.yml
+++ b/.github/workflows/node-sass.yml
@@ -34,3 +34,15 @@ jobs:
           npx --package node-sass@latest node-sass --version
           npx --package node-sass@latest node-sass --output-style expanded --source-map true --source-map-contents true --precision 6 scss/ -o dist-sass/css/
           ls -Al dist-sass/css
+
+      # Check that there are no Sass variables (`$`)
+      - name: Check built CSS files
+        shell: bash
+        run: |
+          if [[ $(find dist-sass/css/ -name "*.css" | xargs grep -F "\$" | wc -l | bc) -eq 0 ]]; then
+            echo "All good, no Sass variables found"
+            exit 0
+          else
+            echo "Found Sass variables!"
+            exit 1
+          fi
diff --git a/scss/_button-group.scss b/scss/_button-group.scss
index eb7969a2d1..55ae3f65d2 100644
--- a/scss/_button-group.scss
+++ b/scss/_button-group.scss
@@ -39,7 +39,7 @@
   // Prevent double borders when buttons are next to each other
   > :not(.btn-check:first-child) + .btn,
   > .btn-group:not(:first-child) {
-    margin-left: calc($btn-border-width * -1); // stylelint-disable-line function-disallowed-list
+    margin-left: calc(#{$btn-border-width} * -1); // stylelint-disable-line function-disallowed-list
   }
 
   // Reset rounded corners
@@ -126,7 +126,7 @@
 
   > .btn:not(:first-child),
   > .btn-group:not(:first-child) {
-    margin-top: calc($btn-border-width * -1); // stylelint-disable-line function-disallowed-list
+    margin-top: calc(#{$btn-border-width} * -1); // stylelint-disable-line function-disallowed-list
   }
 
   // Reset rounded corners
diff --git a/scss/_pagination.scss b/scss/_pagination.scss
index ba83d35784..f275a62eb4 100644
--- a/scss/_pagination.scss
+++ b/scss/_pagination.scss
@@ -75,7 +75,7 @@
     margin-left: $pagination-margin-start;
   }
 
-  @if $pagination-margin-start == calc($pagination-border-width * -1) {
+  @if $pagination-margin-start == calc(#{$pagination-border-width} * -1) {
     &:first-child {
       .page-link {
         @include border-start-radius(var(--#{$prefix}pagination-border-radius));
diff --git a/scss/_tables.scss b/scss/_tables.scss
index 6c981f6c2f..23de7c31b4 100644
--- a/scss/_tables.scss
+++ b/scss/_tables.scss
@@ -42,7 +42,7 @@
 }
 
 .table-group-divider {
-  border-top: calc($table-border-width * 2) solid $table-group-separator-color; // stylelint-disable-line function-disallowed-list
+  border-top: calc(#{$table-border-width} * 2) solid $table-group-separator-color; // stylelint-disable-line function-disallowed-list
 }
 
 //
diff --git a/scss/_variables.scss b/scss/_variables.scss
index abd7a73057..eed9a13535 100644
--- a/scss/_variables.scss
+++ b/scss/_variables.scss
@@ -914,7 +914,7 @@ $input-focus-box-shadow:                $input-btn-focus-box-shadow !default;
 $input-placeholder-color:               var(--#{$prefix}secondary-color) !default;
 $input-plaintext-color:                 var(--#{$prefix}body-color) !default;
 
-$input-height-border:                   calc($input-border-width * 2) !default; // stylelint-disable-line function-disallowed-list
+$input-height-border:                   calc(#{$input-border-width} * 2) !default; // stylelint-disable-line function-disallowed-list
 
 $input-height-inner:                    add($input-line-height * 1em, $input-padding-y * 2) !default;
 $input-height-inner-half:               add($input-line-height * .5em, $input-padding-y) !default;
@@ -1238,7 +1238,7 @@ $dropdown-bg:                       var(--#{$prefix}body-bg) !default;
 $dropdown-border-color:             var(--#{$prefix}border-color-translucent) !default;
 $dropdown-border-radius:            var(--#{$prefix}border-radius) !default;
 $dropdown-border-width:             var(--#{$prefix}border-width) !default;
-$dropdown-inner-border-radius:      calc($dropdown-border-radius - $dropdown-border-width) !default; // stylelint-disable-line function-disallowed-list
+$dropdown-inner-border-radius:      calc(#{$dropdown-border-radius} - #{$dropdown-border-width}) !default; // stylelint-disable-line function-disallowed-list
 $dropdown-divider-bg:               $dropdown-border-color !default;
 $dropdown-divider-margin-y:         $spacer * .5 !default;
 $dropdown-box-shadow:               $box-shadow !default;
@@ -1295,7 +1295,7 @@ $pagination-color:                  var(--#{$prefix}link-color) !default;
 $pagination-bg:                     var(--#{$prefix}body-bg) !default;
 $pagination-border-radius:          var(--#{$prefix}border-radius) !default;
 $pagination-border-width:           var(--#{$prefix}border-width) !default;
-$pagination-margin-start:           calc($pagination-border-width * -1) !default; // stylelint-disable-line function-disallowed-list
+$pagination-margin-start:           calc(#{$pagination-border-width} * -1) !default; // stylelint-disable-line function-disallowed-list
 $pagination-border-color:           var(--#{$prefix}border-color) !default;
 
 $pagination-focus-color:            var(--#{$prefix}link-hover-color) !default;
@@ -1429,7 +1429,7 @@ $popover-max-width:                 276px !default;
 $popover-border-width:              var(--#{$prefix}border-width) !default;
 $popover-border-color:              var(--#{$prefix}border-color-translucent) !default;
 $popover-border-radius:             var(--#{$prefix}border-radius-lg) !default;
-$popover-inner-border-radius:       calc($popover-border-radius - $popover-border-width) !default; // stylelint-disable-line function-disallowed-list
+$popover-inner-border-radius:       calc(#{$popover-border-radius} - #{$popover-border-width}) !default; // stylelint-disable-line function-disallowed-list
 $popover-box-shadow:                $box-shadow !default;
 
 $popover-header-font-size:          $font-size-base !default;
diff --git a/scss/forms/_input-group.scss b/scss/forms/_input-group.scss
index d6370ed7f0..58e4d409c0 100644
--- a/scss/forms/_input-group.scss
+++ b/scss/forms/_input-group.scss
@@ -121,7 +121,7 @@
   }
 
   > :not(:first-child):not(.dropdown-menu)#{$validation-messages} {
-    margin-left: calc($input-border-width * -1); // stylelint-disable-line function-disallowed-list
+    margin-left: calc(#{$input-border-width} * -1); // stylelint-disable-line function-disallowed-list
     @include border-start-radius(0);
   }