diff --git a/internal/rosa/builtins.go b/internal/rosa/builtins.go
index 55ac0cf1..f0527af8 100644
--- a/internal/rosa/builtins.go
+++ b/internal/rosa/builtins.go
@@ -18,6 +18,11 @@ const (
 	jobsLE = `"$(expr ` + jobsE + ` '*' 2)"`
 	// jobsLFlagE is expression for flag with double of preferred job count.
 	jobsLFlagE = `"-j$(expr ` + jobsE + ` '*' 2)"`
+
+	// loadE is expression for preferred loadavg target set by [pkg].
+	loadE = `"$` + pkg.EnvLoad + `"`
+	// loadFlagE is expression for flag with preferred loadavg target.
+	loadFlagE = `"-l$` + pkg.EnvLoad + `"`
 )
 
 // newTar wraps [pkg.NewHTTPGetTar] with a simpler function signature.
diff --git a/internal/rosa/cmake.go b/internal/rosa/cmake.go
index b058b5bf..6470758a 100644
--- a/internal/rosa/cmake.go
+++ b/internal/rosa/cmake.go
@@ -61,10 +61,10 @@ func (attr *CMakeHelper) script(t Toolchain, name string) string {
 	}
 
 	generate := "Ninja"
-	test := "ninja " + jobsFlagE + " test"
+	test := "ninja " + jobsFlagE + " " + loadFlagE + " test"
 	if attr.Make {
 		generate = "'Unix Makefiles'"
-		test = "make " + jobsFlagE + " test"
+		test = "make " + jobsFlagE + " " + loadFlagE + " test"
 	}
 	if attr.Test != "" {
 		test = attr.Test
@@ -97,7 +97,7 @@ cmake -G ` + generate + ` \
 	}), " \\\n\t") + ` \
 	-DCMAKE_INSTALL_PREFIX=/system \
 	'/usr/src/` + name + `/` + filepath.Join(attr.Append...) + `'
-cmake --build . --parallel=` + jobsE + `
+cmake --build . --parallel=` + jobsE + ` -- ` + loadFlagE + `
 DESTDIR=/work cmake --install .
 ` + script
 }
diff --git a/internal/rosa/llvm.go b/internal/rosa/llvm.go
index 8fd515d2..40167181 100644
--- a/internal/rosa/llvm.go
+++ b/internal/rosa/llvm.go
@@ -365,7 +365,7 @@ ln -s clang++ /work/system/bin/c++
 			// on 3-stage determinism to test later stages.
 			SkipTest: t.stage.isStage0(),
 
-			Test: "ninja " + jobsFlagE + " check-all",
+			Test: "ninja " + jobsFlagE + " " + loadFlagE + " check-all",
 		},
 			_python,
 			_perl,
diff --git a/internal/rosa/make.go b/internal/rosa/make.go
index 257c51f1..d143a137 100644
--- a/internal/rosa/make.go
+++ b/internal/rosa/make.go
@@ -160,7 +160,8 @@ func (attr *MakeHelper) script(t Toolchain, name string) string {
 
 	scriptMake := `
 make \
-	` + jobsFlagE
+	` + jobsFlagE + ` \
+	` + loadFlagE
 	if len(attr.Make) > 0 {
 		scriptMake += " \\\n\t" + strings.Join(attr.Make, " \\\n\t")
 	}
@@ -170,6 +171,7 @@ make \
 		(!attr.SkipCheckEarly || !t.stage.isStage0()) {
 		scriptMake += attr.ScriptCheckEarly + `make \
 	` + jobsFlagE + ` \
+	` + loadFlagE + ` \
 	`
 		if len(attr.Check) > 0 {
 			scriptMake += strings.Join(attr.Check, " \\\n\t")
diff --git a/internal/rosa/package/firmware.az b/internal/rosa/package/firmware.az
index 7ee77930..6355c93b 100644
--- a/internal/rosa/package/firmware.az
+++ b/internal/rosa/package/firmware.az
@@ -34,7 +34,7 @@ package firmware {
 		// requires pre-commit
 		skipCheck = true;
 
-		install = "make " + jobsFlagE + " DESTDIR=/work/system dedup";
+		install = "make " + jobsFlagE + " " + loadFlagE + " DESTDIR=/work/system dedup";
 	};
 
 	inputs = [
diff --git a/internal/rosa/package/git.az b/internal/rosa/package/git.az
index f2da8ef5..870c9257 100644
--- a/internal/rosa/package/git.az
+++ b/internal/rosa/package/git.az
@@ -70,6 +70,7 @@ disable_test t5515-fetch-merge-logic
 
 		install = `make \
 	` + jobsFlagE + ` \
+	` + loadFlagE + ` \
 	DESTDIR=/work \
 	NO_INSTALL_HARDLINKS=1 \
 	install`;
diff --git a/internal/rosa/package/kernel/package.az b/internal/rosa/package/kernel/package.az
index babfedaf..698266ee 100644
--- a/internal/rosa/package/kernel/package.az
+++ b/internal/rosa/package/kernel/package.az
@@ -111,6 +111,7 @@ install -Dm0500 \
 
 make \
 	` + jobsFlagE + ` \
+	` + loadFlagE + ` \
 	-f /usr/src/kernel/Makefile \
 	O=/tmp/kbuild \
 	LLVM=1 \
diff --git a/internal/rosa/package/ninja.az b/internal/rosa/package/ninja.az
index 2eb7694b..cb103656 100644
--- a/internal/rosa/package/ninja.az
+++ b/internal/rosa/package/ninja.az
@@ -23,7 +23,7 @@ python3 /usr/src/ninja/configure.py \
 	--bootstrap
 python3 /usr/src/ninja/configure.py \
 	--gtest-source-dir=/usr/src/extra/googletest
-./ninja ` + jobsFlagE + ` all
+./ninja ` + jobsFlagE + ` ` + loadFlagE + ` all
 `;
 
 		check = "./ninja_test";
diff --git a/internal/rosa/perl.go b/internal/rosa/perl.go
index 3a9f56ac..313f8dc8 100644
--- a/internal/rosa/perl.go
+++ b/internal/rosa/perl.go
@@ -32,11 +32,13 @@ func (attr *MakeMakerHelper) script(t Toolchain, _ string) string {
 	script := `perl Makefile.PL \
 	PREFIX=/system
 make \
-	` + jobsFlagE
+	` + jobsFlagE + ` \
+	` + loadFlagE
 	if !attr.SkipCheck && t.opts&OptSkipCheck == 0 {
 		script += `
 make \
 	` + jobsFlagE + ` \
+	` + loadFlagE + ` \
 	test
 `
 	}
diff --git a/internal/rosa/state.go b/internal/rosa/state.go
index 088963bf..2939057d 100644
--- a/internal/rosa/state.go
+++ b/internal/rosa/state.go
@@ -499,6 +499,9 @@ func (s *S) getFrame() azalea.Frame {
 			k("jobsLE"):     jobsLE,
 			k("jobsLFlagE"): jobsLFlagE,
 
+			k("loadE"):     loadE,
+			k("loadFlagE"): loadFlagE,
+
 			k("anityaFallback"): (*Versions).getStable,
 			k("anityaLegacyCPAN"): func(v *Versions) string {
 				for _, e := range v.Stable {