You have two different defined namespaces:
- In XML:
http://schemas.microsoft.com/wix/2006/wi
- In XSLT:
http://schemas.microsoft.com/wix/2006/wix
As far as I know, correct namespace for WiX is http://schemas.microsoft.com/wix/2006/wi
. So you should change your XSLT.
XSLT:
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:msxsl="urn:schemas-microsoft-com:xslt"
exclude-result-prefixes="msxsl"
xmlns:wix="http://schemas.microsoft.com/wix/2006/wi"
xmlns:my="my:my">
<xsl:output method="xml" indent="yes" />
<xsl:strip-space elements="*"/>
<xsl:template match="@*|node()">
<xsl:copy>
<xsl:apply-templates select="@*|node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="wix:Wix/wix:Fragment/wix:DirectoryRef/wix:Component/wix:File[@Id and not (@Id = "EmailGenerationService.exe")]">
<xsl:copy>
<xsl:apply-templates select="@*"/>
<xsl:attribute name="KeyPath">
<xsl:text>no</xsl:text>
</xsl:attribute>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>
Input XML:
<Wix xmlns="http://schemas.microsoft.com/wix/2006/wi">
<Fragment>
<DirectoryRef Id="INSTALLLOCATION">
<Component Id="Dollar.Common.dll" Guid="{2BCD0767-2383-47CF-B1BF-325FA4A3264F}">
<File Id="Dollar.Common.dll" KeyPath="yes" Source="$(var.FileSource)\Dollar.Common.dll" />
</Component>
<Component Id="Dollar.Common.Exceptions.dll" Guid="{B7238091-76D1-42F5-A3B4-A539DFF3BD92}">
<File Id="Dollar.Common.Exceptions.dll" KeyPath="yes" Source="$(var.FileSource)\Dollar.Common.Exceptions.dll" />
</Component>
<Component Id="Dollar.Common.Exceptions.pdb" Guid="{43711979-747D-49C9-BAE4-ECD44FAF5E67}">
<File Id="Dollar.Common.Exceptions.pdb" KeyPath="yes" Source="$(var.FileSource)\Dollar.Common.Exceptions.pdb" />
</Component>
<Component Id="Dollar.Common.Logging.dll" Guid="{59F9ABF3-5F68-410C-BC96-0556282F1E04}">
<File Id="Dollar.Common.Logging.dll" KeyPath="yes" Source="$(var.FileSource)\Dollar.Common.Logging.dll" />
</Component>
</DirectoryRef>
</Fragment>
</Wix>
Output XML:
<Wix xmlns="http://schemas.microsoft.com/wix/2006/wi">
<Fragment>
<DirectoryRef Id="INSTALLLOCATION">
<Component Id="Dollar.Common.dll" Guid="{2BCD0767-2383-47CF-B1BF-325FA4A3264F}">
<File Id="Dollar.Common.dll" Source="$(var.FileSource)\Dollar.Common.dll" KeyPath="no" />
</Component>
<Component Id="Dollar.Common.Exceptions.dll" Guid="{B7238091-76D1-42F5-A3B4-A539DFF3BD92}">
<File Id="Dollar.Common.Exceptions.dll" Source="$(var.FileSource)\Dollar.Common.Exceptions.dll" KeyPath="no" />
</Component>
<Component Id="Dollar.Common.Exceptions.pdb" Guid="{43711979-747D-49C9-BAE4-ECD44FAF5E67}">
<File Id="Dollar.Common.Exceptions.pdb" Source="$(var.FileSource)\Dollar.Common.Exceptions.pdb" KeyPath="no" />
</Component>
<Component Id="Dollar.Common.Logging.dll" Guid="{59F9ABF3-5F68-410C-BC96-0556282F1E04}">
<File Id="Dollar.Common.Logging.dll" Source="$(var.FileSource)\Dollar.Common.Logging.dll" KeyPath="no" />
</Component>
</DirectoryRef>
</Fragment>
</Wix>