diff --git a/.github/workflows/CICD.yml b/.github/workflows/CICD.yml
index 941bb49fad3..5e18d2bcc30 100644
--- a/.github/workflows/CICD.yml
+++ b/.github/workflows/CICD.yml
@@ -1014,16 +1014,18 @@ jobs:
       run: cargo nextest run --profile ci --hide-progress-bar ${{ steps.vars.outputs.CARGO_FEATURES_OPTION }} -p uucore -p coreutils
       env:
         RUSTC_WRAPPER: ""
-        RUSTFLAGS: "-Zprofile -Ccodegen-units=1 -Copt-level=0 -Clink-dead-code -Coverflow-checks=off -Zpanic_abort_tests -Cpanic=abort"
+        RUSTFLAGS: "-Cinstrument-coverage -Ccodegen-units=1 -Copt-level=0 -Clink-dead-code -Coverflow-checks=off -Zpanic_abort_tests -Cpanic=abort"
         RUSTDOCFLAGS: "-Cpanic=abort"
         RUST_BACKTRACE: "1"
+        LLVM_PROFILE_FILE: ${{ github.workspace }}/build/profile-%p-%m.profraw
         # RUSTUP_TOOLCHAIN: ${{ steps.vars.outputs.TOOLCHAIN }}
     - name: Test individual utilities
       run: cargo nextest run --profile ci --hide-progress-bar ${{ steps.dep_vars.outputs.CARGO_UTILITY_LIST_OPTIONS }}
       env:
         RUSTC_WRAPPER: ""
-        RUSTFLAGS: "-Zprofile -Ccodegen-units=1 -Copt-level=0 -Clink-dead-code -Coverflow-checks=off -Zpanic_abort_tests -Cpanic=abort"
+        RUSTFLAGS: "-Cinstrument-coverage -Ccodegen-units=1 -Copt-level=0 -Clink-dead-code -Coverflow-checks=off -Zpanic_abort_tests -Cpanic=abort"
         RUSTDOCFLAGS: "-Cpanic=abort"
+        LLVM_PROFILE_FILE: ${{ github.workspace }}/build/profile-%p-%m.profraw
         RUST_BACKTRACE: "1"
         # RUSTUP_TOOLCHAIN: ${{ steps.vars.outputs.TOOLCHAIN }}
     - name: Generate coverage data (via `grcov`)
@@ -1037,9 +1039,9 @@ jobs:
         # GRCOV_EXCLUDE_OPTION='--excl-br-line "^\s*((debug_)?assert(_eq|_ne)?!|#\[derive\()"' ## `grcov` ignores these params when passed as an environment variable (why?)
         mkdir -p "${COVERAGE_REPORT_DIR}"
         # display coverage files
-        grcov . --output-type files --ignore build.rs --ignore "vendor/*" --ignore "/*" --ignore "[a-zA-Z]:/*" --excl-br-line "^\s*((debug_)?assert(_eq|_ne)?!|#\[derive\()" | sort --unique
+        grcov ${{ github.workspace }}/build/profile-%p-%m.profraw --output-type files --ignore build.rs --ignore "vendor/*" --ignore "/*" --ignore "[a-zA-Z]:/*" --excl-br-line "^\s*((debug_)?assert(_eq|_ne)?!|#\[derive\()" | sort --unique
         # generate coverage report
-        grcov . --output-type lcov --output-path "${COVERAGE_REPORT_FILE}" --branch --ignore build.rs --ignore "vendor/*" --ignore "/*" --ignore "[a-zA-Z]:/*" --excl-br-line "^\s*((debug_)?assert(_eq|_ne)?!|#\[derive\()"
+        grcov ${{ github.workspace }}/build/profile-%p-%m.profraw --output-type lcov --output-path "${COVERAGE_REPORT_FILE}" --branch --ignore build.rs --ignore "vendor/*" --ignore "/*" --ignore "[a-zA-Z]:/*" --excl-br-line "^\s*((debug_)?assert(_eq|_ne)?!|#\[derive\()"
         echo "report=${COVERAGE_REPORT_FILE}" >> $GITHUB_OUTPUT
     - name: Upload coverage results (to Codecov.io)
       uses: codecov/codecov-action@v4
diff --git a/.github/workflows/GnuTests.yml b/.github/workflows/GnuTests.yml
index fc165e0b3e5..41091cc1696 100644
--- a/.github/workflows/GnuTests.yml
+++ b/.github/workflows/GnuTests.yml
@@ -383,8 +383,9 @@ jobs:
         locale -a
     - name: Build binaries
       env:
-        RUSTFLAGS: "-Zprofile -Ccodegen-units=1 -Copt-level=0 -Clink-dead-code -Coverflow-checks=off -Zpanic_abort_tests -Cpanic=abort"
+        RUSTFLAGS: "-Cinstrument-coverage -Ccodegen-units=1 -Copt-level=0 -Clink-dead-code -Coverflow-checks=off -Zpanic_abort_tests -Cpanic=abort"
         RUSTDOCFLAGS: "-Cpanic=abort"
+        LLVM_PROFILE_FILE: ${{ github.workspace }}/build/profile-%p-%m.profraw
       run: |
         ## Build binaries
         cd uutils
@@ -401,9 +402,9 @@ jobs:
         mkdir -p "${COVERAGE_REPORT_DIR}"
         sudo chown -R "$(whoami)" "${COVERAGE_REPORT_DIR}"
         # display coverage files
-        grcov . --output-type files --ignore build.rs --ignore "vendor/*" --ignore "/*" --ignore "[a-zA-Z]:/*" --excl-br-line "^\s*((debug_)?assert(_eq|_ne)?!|#\[derive\()" | sort --unique
+        grcov ${{ github.workspace }}/build/profile-%p-%m.profraw --output-type files --ignore build.rs --ignore "vendor/*" --ignore "/*" --ignore "[a-zA-Z]:/*" --excl-br-line "^\s*((debug_)?assert(_eq|_ne)?!|#\[derive\()" | sort --unique
         # generate coverage report
-        grcov . --output-type lcov --output-path "${COVERAGE_REPORT_FILE}" --branch --ignore build.rs --ignore "vendor/*" --ignore "/*" --ignore "[a-zA-Z]:/*" --excl-br-line "^\s*((debug_)?assert(_eq|_ne)?!|#\[derive\()"
+        grcov ${{ github.workspace }}/build/profile-%p-%m.profraw --output-type lcov --output-path "${COVERAGE_REPORT_FILE}" --branch --ignore build.rs --ignore "vendor/*" --ignore "/*" --ignore "[a-zA-Z]:/*" --excl-br-line "^\s*((debug_)?assert(_eq|_ne)?!|#\[derive\()"
         echo "report=${COVERAGE_REPORT_FILE}" >> $GITHUB_OUTPUT
     - name: Upload coverage results (to Codecov.io)
       uses: codecov/codecov-action@v4