diff --git a/.github/workflows/run_affected_benchmarks.yml b/.github/workflows/run_affected_benchmarks.yml
index 4d8d51803e3f..42381a7fbec5 100644
--- a/.github/workflows/run_affected_benchmarks.yml
+++ b/.github/workflows/run_affected_benchmarks.yml
@@ -131,7 +131,7 @@ jobs:
               files=$(git diff --diff-filter=AM --name-only ${{ github.event.before }} ${{ github.event.after }})
             fi
           fi
-          directories=$(for file in $files; do dirname $file; done | uniq | tr '\n' ' ' | sed 's/ $//')
+          directories=$(for file in $files; do dirname $file; done | sort -u | tr '\n' ' ' | sed 's/ $//')
           echo "directories=${directories}" >> $GITHUB_OUTPUT
 
       # Get list of changed directories from workflow dispatch event:
diff --git a/.github/workflows/run_affected_tests.yml b/.github/workflows/run_affected_tests.yml
index cad27d1029db..307a0a7e1b47 100644
--- a/.github/workflows/run_affected_tests.yml
+++ b/.github/workflows/run_affected_tests.yml
@@ -163,7 +163,7 @@ jobs:
               files=$(git diff --diff-filter=AM --name-only ${{ github.event.before }} ${{ github.event.after }})
             fi
           fi
-          directories=$(for file in $files; do dirname $file; done | uniq | tr '\n' ' ' | sed 's/ $//')
+          directories=$(for file in $files; do dirname $file; done | sort -u | tr '\n' ' ' | sed 's/ $//')
           echo "directories=${directories}" >> $GITHUB_OUTPUT
 
       # Get list of changed directories from workflow dispatch event:
diff --git a/.github/workflows/run_tests_coverage.yml b/.github/workflows/run_tests_coverage.yml
index 37392e29e0d4..071821bb9d15 100644
--- a/.github/workflows/run_tests_coverage.yml
+++ b/.github/workflows/run_tests_coverage.yml
@@ -134,7 +134,7 @@ jobs:
           else
             files=$(git diff --diff-filter=AM --name-only ${{ github.event.before }} ${{ github.event.after }})
           fi
-          directories=$(for file in $files; do dirname $file; done | uniq | tr '\n' ' ' | sed 's/ $//')
+          directories=$(for file in $files; do dirname $file; done | sort -u | tr '\n' ' ' | sed 's/ $//')
           echo "directories=${directories}" >> $GITHUB_OUTPUT
 
       # Get list of changed directories from workflow dispatch event:
diff --git a/.github/workflows/run_tests_coverage_pr.yml b/.github/workflows/run_tests_coverage_pr.yml
index 2a6beab9fd80..0394da521c2d 100644
--- a/.github/workflows/run_tests_coverage_pr.yml
+++ b/.github/workflows/run_tests_coverage_pr.yml
@@ -123,7 +123,7 @@ jobs:
           # Get changed files using git diff against base branch:
           git fetch origin ${{ github.base_ref }} --depth=1
           files=$(git diff --diff-filter=AM --name-only origin/${{ github.base_ref }}...HEAD)
-          directories=$(for file in $files; do dirname $file; done | uniq | tr '\n' ' ' | sed 's/ $//')
+          directories=$(for file in $files; do dirname $file; done | sort -u | tr '\n' ' ' | sed 's/ $//')
           echo "directories=${directories}" >> $GITHUB_OUTPUT
 
       # Exit early if non-package directories are changed:
diff --git a/.github/workflows/scripts/run_affected_benchmarks/run b/.github/workflows/scripts/run_affected_benchmarks/run
index eec70bfa3f88..765a4045a002 100755
--- a/.github/workflows/scripts/run_affected_benchmarks/run
+++ b/.github/workflows/scripts/run_affected_benchmarks/run
@@ -110,7 +110,7 @@ main() {
 	changed=$(echo "${changed}" | tr ' ' '\n' | grep '^lib/node_modules/@stdlib') || true
 
 	# Find unique package directories:
-	directories=$(echo "${changed}" | tr ' ' '\n' | sed -E 's/\/(benchmark|bin|data|docs|etc|examples|include|lib|scripts|src|test)(\/.*)?$//' | uniq)
+	directories=$(echo "${changed}" | tr ' ' '\n' | sed -E 's/\/(benchmark|bin|data|docs|etc|examples|include|lib|scripts|src|test)(\/.*)?$//' | sort -u)
 
 	if [ -z "${directories}" ]; then
 		echo 'No packages to run benchmarks for.' >&2
diff --git a/.github/workflows/scripts/run_affected_tests/run b/.github/workflows/scripts/run_affected_tests/run
index cb1add9e441f..fe58584b8a9d 100755
--- a/.github/workflows/scripts/run_affected_tests/run
+++ b/.github/workflows/scripts/run_affected_tests/run
@@ -110,7 +110,7 @@ main() {
 	changed=$(echo "${changed}" | tr ' ' '\n' | grep '^lib/node_modules/@stdlib') || true
 
 	# Find unique package directories:
-	directories=$(echo "${changed}" | tr ' ' '\n' | sed -E 's/\/(benchmark|bin|data|docs|etc|examples|include|lib|scripts|src|test)(\/.*)?$//' | uniq)
+	directories=$(echo "${changed}" | tr ' ' '\n' | sed -E 's/\/(benchmark|bin|data|docs|etc|examples|include|lib|scripts|src|test)(\/.*)?$//' | sort -u)
 
 	if [ -z "${directories}" ]; then
 		echo 'No packages to test.' >&2
@@ -141,6 +141,9 @@ main() {
 		directories="${directories} ${required_by}"
 	fi
 
+	# Deduplicate the merged list of directories:
+	directories=$(echo "${directories}" | tr ' ' '\n' | sort -u)
+
 	# Build native add-ons for packages (if applicable):
 	for pkg in ${packages}; do
 		if [ -f "lib/node_modules/${pkg}/binding.gyp" ]; then
diff --git a/.github/workflows/scripts/run_tests_coverage/run b/.github/workflows/scripts/run_tests_coverage/run
index a86cce271eb0..35a6ab95799c 100755
--- a/.github/workflows/scripts/run_tests_coverage/run
+++ b/.github/workflows/scripts/run_tests_coverage/run
@@ -129,7 +129,7 @@ main() {
 	  grep -v '^lib/node_modules/@stdlib/_tools') || true
 
 	# Find unique package directories:
-	directories=$(echo "${changed}" | tr ' ' '\n' | sed -E 's/\/(benchmark|bin|data|docs|etc|examples|include|lib|scripts|src|test)(\/.*)?\/?$//' | uniq)
+	directories=$(echo "${changed}" | tr ' ' '\n' | sed -E 's/\/(benchmark|bin|data|docs|etc|examples|include|lib|scripts|src|test)(\/.*)?\/?$//' | sort -u)
 
 	if [ -z "${directories}" ]; then
 		echo 'No packages to test.' >&2