diff --git a/debian/constants.go b/debian/constants.go
index 711726d..57b39a1 100644
--- a/debian/constants.go
+++ b/debian/constants.go
@@ -7,7 +7,7 @@ var buildEnvironmentDeps = []string{
 	"ca-certificates",
 }
 
-var ArchToDebian = map[string]string{
+var DebianArchs = map[string]string{
 	"any":     "all",
 	"x86_64":  "amd64",
 	"i686":    "386",
diff --git a/debian/debian.go b/debian/debian.go
index 97cfede..ff59cea 100644
--- a/debian/debian.go
+++ b/debian/debian.go
@@ -23,7 +23,7 @@ type Debian struct {
 
 func (d *Debian) getArch() {
 	for index, arch := range d.PKGBUILD.Arch {
-		d.PKGBUILD.Arch[index] = ArchToDebian[arch]
+		d.PKGBUILD.Arch[index] = DebianArchs[arch]
 	}
 }
 
diff --git a/redhat/constants.go b/redhat/constants.go
index 68fab15..978aeb8 100644
--- a/redhat/constants.go
+++ b/redhat/constants.go
@@ -56,7 +56,7 @@ var (
 		"x11":          "User Interface/X",
 	}
 
-	ArchToRPM = map[string]string{
+	RPMArchs = map[string]string{
 		"x86_64":  "x86_64",
 		"i686":    "i686",
 		"aarch64": "aarch64",
@@ -76,6 +76,9 @@ Epoch: {{.Epoch}}
 {{- end }}
 Version: {{.PkgVer}}
 Release: {{.PkgRel}}
+{{- with .Arch}}
+BuildArch: {{join .}}
+{{- end }}
 {{- if .Section}}
 Group: {{.Section}}
 {{- end }}
@@ -124,23 +127,23 @@ BuildRequires: {{join .}}
 {{- end }}
 {{- end }}
 
-{{- with .PreInst}}
+{{- if .PreInst}}
 %pre
 {{.PreInst}}
 {{- end }}
 
-{{- with .PostInst}}
+{{- if .PostInst}}
 %post
-{{.PostRm}}
+{{.PostInst}}
 {{- end }}
 
-{{- with .PreRm}}
+{{- if .PreRm}}
 %preun
 if [[ "$1" -ne 0 ]]; then exit 0; fi
 {{.PreRm}}
 {{- end }}
 
-{{- with .PostRm}}
+{{- if .PostRm}}
 %postun
 if [[ "$1" -ne 0 ]]; then exit 0; fi
 {{.PostRm}}
diff --git a/redhat/redhat.go b/redhat/redhat.go
index 6c65988..4cf26ea 100644
--- a/redhat/redhat.go
+++ b/redhat/redhat.go
@@ -23,6 +23,12 @@ type Redhat struct {
 	srpmsDir     string
 }
 
+func (r *Redhat) getRPMArch() {
+	for index, arch := range r.PKGBUILD.Arch {
+		r.PKGBUILD.Arch[index] = RPMArchs[arch]
+	}
+}
+
 func (r *Redhat) getRPMGroup() {
 	r.PKGBUILD.Section = RPMGroups[r.PKGBUILD.Section]
 }
@@ -141,6 +147,7 @@ func (r *Redhat) makeDirs() error {
 }
 
 func (r *Redhat) Build(artifactsPath string) error {
+	r.getRPMArch()
 	r.getRPMGroup()
 	r.PKGBUILD.PkgDest, _ = filepath.Abs(artifactsPath)
 
@@ -193,10 +200,10 @@ func (r *Redhat) Install(artifactsPath string) error {
 			"-" +
 			r.PKGBUILD.PkgRel +
 			"." +
-			ArchToRPM[arch] +
+			RPMArchs[arch] +
 			".rpm"
 
-		pkgFilePath := filepath.Join(artifactsPath, ArchToRPM[arch], pkgName)
+		pkgFilePath := filepath.Join(artifactsPath, RPMArchs[arch], pkgName)
 
 		if err := utils.Exec("", "yum", "install", "-y", pkgFilePath); err != nil {
 			return err